TRACHOMA 2020 REPORT OF THE 23RD MEETING OF THE WHO ALLIANCE FOR THE GLOBAL ELIMINATION OF - WHO | World Health Organization
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REPORT OF THE 23RD MEETING OF THE WHO ALLIANCE FOR THE GLOBAL ELIMINATION OF TRACHOMA BY 2020 30 NOVEMBER–1 DECEMBER 2020
REPORT OF THE 23RD MEETING OF THE WHO ALLIANCE FOR THE GLOBAL ELIMINATION OF TRACHOMA BY 2020 30 NOVEMBER–1 DECEMBER 2020
Report of the 23rd meeting of the WHO Alliance for the Global Elimination of Trachoma by 2020, 30 November–1 December 2020 ISBN 978-92-4-002392-5 (electronic version) ISBN 978-92-4-002393-2 (print version) © World Health Organization 2021 Some rights reserved. This work is available under the Creative Commons Attribution-NonCommercial- ShareAlike 3.0 IGO licence (CC BY-NC-SA 3.0 IGO; https://creativecommons.org/licenses/by-nc-sa/3.0/igo). Under the terms of this licence, you may copy, redistribute and adapt the work for non-commercial purposes, provided the work is appropriately cited, as indicated below. In any use of this work, there should be no suggestion that WHO endorses any specific organization, products or services. The use of the WHO logo is not permitted. If you adapt the work, then you must license your work under the same or equivalent Creative Commons licence. If you create a translation of this work, you should add the following disclaimer along with the suggested citation: “This translation was not created by the World Health Organization (WHO). WHO is not responsible for the content or accuracy of this translation. The original English edition shall be the binding and authentic edition”. Any mediation relating to disputes arising under the licence shall be conducted in accordance with the mediation rules of the World Intellectual Property Organization. Suggested citation. Report of the 23rd meeting of the WHO Alliance for the Global Elimination of Trachoma by 2020, 30 November–1 December 2020. Geneva: World Health Organization; 2021. Licence: CC BY-NC-SA 3.0 IGO. Cataloguing-in-Publication (CIP) data. CIP data are available at http://apps.who.int/iris. Sales, rights and licensing. To purchase WHO publications, see http://apps.who.int/bookorders. To submit requests for commercial use and queries on rights and licensing, see https://www.who.int/about/licensing/en. Third-party materials. If you wish to reuse material from this work that is attributed to a third party, such as tables, figures or images, it is your responsibility to determine whether permission is needed for that reuse and to obtain permission from the copyright holder. The risk of claims resulting from infringement of any third-party- owned component in the work rests solely with the user. General disclaimers. The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of WHO concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Dotted and dashed lines on maps represent approximate border lines for which there may not yet be full agreement. The mention of specific companies or of certain manufacturers’ products does not imply that they are endorsed or recommended by WHO in preference to others of a similar nature that are not mentioned. Errors and omissions excepted, the names of proprietary products are distinguished by initial capital letters. All reasonable precautions have been taken by WHO to verify the information contained in this publication. However, the published material is being distributed without warranty of any kind, either expressed or implied. The responsibility for the interpretation and use of the material lies with the reader. In no event shall WHO be liable for damages arising from its use.
Contents Acknowledgements − 5.3 WHO Regional Office for the Americas − 5.4 WHO Regional Office for South-East Asia 1 − 5.5 WHO Regional Office for the Western 1. Introduction Pacific 2. The WHO Alliance for the Global Elimination of Trachoma 3 6. Reports from partners 13 by 2020, 1996–2020 − 6.1 International Coalition for Trachoma Control − 6.2 International Trachoma Initiative − 6.3 Tropical Data 3. The road map for neglected tropical diseases 2021–2030 5 iii 7. Report from the Trachoma Scientific Informal Workshop 16 4. Report from WHO 8 5. Reports from WHO regional offices 9 References 18 Annexes − 5.1 WHO Regional Office for Africa Annex 1: Agenda − 5.2 WHO Regional Office for the Eastern Annex 2: List of participants Mediterranean
Acknowledgements T he 23rd meeting of the WHO Alliance for the Global Elimination of Trachoma by 2020 was supported by the Task Force for Global Health and the United States Agency for International Development. The Alliance thanks Elisabeth Heseltine for her work as meeting rapporteur, and Karen Ciceri- Reynolds, Anthony W. Solomon and Patrick Tissot for report editing and design. iv
1. Introduction O wing to the COVID-19 pandemic, the 23rd meeting of the World Health Organization (WHO) Alliance for the Global Elimination of Trachoma by 2020 (GET2020) took place virtually, and in abbreviated form, from 30 November to 1 December 2020. 1 The meeting was opened by Dr Ren Minghui, WHO Assistant Director-General for Universal Health Coverage/Communicable and Noncommunicable Diseases, who noted that WHO’s resolve to fight trachoma was as strong as it had ever been, and pledged, at the request of WHO Member States, that WHO would continue to lead the Alliance until global elimination of trachoma as a public health problem is achieved. He noted that 2020 was a milestone year for trachoma, being the original target date for global elimination. Though the trachoma community was not yet able to celebrate total success, he acknowledged that great progress had been made. He thanked participants for joining the meeting and for their continuing partnership. Dr Anthony Solomon, Secretary to the Alliance, nominated a Chair, Dr Fikreab Kebede, and Rapporteur, Ms Elisabeth Heseltine, who were confirmed by the Alliance by acclamation. The agenda (Annex 1) and list of participants (Annex 2) for the meeting are found at the end of this report.
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2. The WHO Alliance for the Global Elimination of Trachoma by 2020, 1996–2020 P rofessor Serge Resnikoff, Organisation pour la Prévention de la Cécité, reviewing the work of the Alliance since its inception, preliminary results quickly showed that it was at least as effective as tetracycline eye ointment (8). Directly observed treatment with a said that much has been achieved since its single oral dose represented an operational establishment in 1996. Ten countries have advantage over the 6-week course required been validated as having eliminated trachoma with tetracycline eye ointment. In 1987, when as a public health problem (1), eight are under the Merck company donated ivermectin for 3 surveillance or awaiting validation and many the treatment of onchocerciasis, a neglected more are working towards that goal. WHO tropical disease (NTD) that was being started addressing trachoma very early in its addressed by many of the same organizations own history, with establishment of a study as were working on trachoma, hopes were group on trachoma in 1948, which led to raised that a similar donation of azithromycin adoption of a resolution by the Third World might be made. Health Assembly in 1950 (2). That resolution The first Global Scientific Meeting on resulted in joint WHO–UNICEF trachoma Trachoma was held in 1996, and a group–the control programmes in 23 countries and WHO Alliance–was convened for the global establishment of a WHO expert committee elimination of trachoma by 2020 (9). They (3-5). Introduction of the Prevention of endorsed the SAFE strategy within primary Blindness programme at WHO in 1976, health care, recommended that azithromycin development of dedicated WHO collaborating be used by programmes and considered centres and publication of the simplified how it could be made available. The terms of system for grading trachoma in 1987 (6) were reference of the Alliance were established, and further major milestones. Development of its priorities were defined. The initiative was the SAFE strategy (surgery, antibiotics, facial accelerated with the donation of azithromycin cleanliness and environmental improvement) by Pfizer. in 1993 (7) was also a significant advance. Much has been achieved since 1996. The During the same period, several clinical trials number of people who require the A, F and were undertaken to evaluate the efficacy of E components of SAFE has decreased by azithromycin in treating active trachoma, and 91% since 2002; the number who receive
antibiotics for trachoma elimination purposes require surgery has decreased from 7.6 million has increased to 95.2 million annually in 2019; to 2 million, although the numbers who and the number of people with trichiasis who receive surgery vary considerably from year to year (10). 4
3. The road map for neglected tropical diseases 2021–2030 D r Mwele Ntuli Malecela, Director, WHO Department of Control of Neglected Tropical Diseases, described progress made to trachoma programmes is ensuring that 100% of the population in endemic areas have access to at least basic water supply, since the first NTD road map was published in sanitation and hygiene. A gap assessment for 2012 (11) in the number of treatments delivered NTDs conducted with heat maps showed that annually and the number of countries that have trachoma programmes have a particular need eliminated at least one NTD. The new road map for greater advocacy and funding (12). 5 2021–2030 (12) was prepared collaboratively, with regions, countries, partners, experts, The road map was endorsed by the Seventy- colleagues, reviewers and the public. It sets third World Health Assembly in November public health targets for NTDs ranging from 2020 (13), which also adopted a resolution control through elimination as a public health on integrated, people-centred eye care and problem to elimination and eradication. The implementation of the recommendations in road map is a high-level strategy document the World Report on Vision, launched in 2019 that sets the overall direction for combatting (14). NTDs and can be used for policy and advocacy and to align efforts. It includes specific, measurable disease-specific targets and also Panel discussion cross-cutting targets among related sectors and health systems, which should reduce costs A panel discussion was held among participants and increase impact in the context of universal from Cameroon, Colombia, Fiji, Nepal, Sudan health coverage. The road map encourages and Togo. three essential shifts: from measuring process to measuring impact, from vertical programmes On the topic of integrating actions against to holistic, cross-cutting strategies and from several NTDs, one participant said that some a situation in which momentum has often areas were more advanced towards elimination been generated primarily by partners to one and were better financed whereas there in which country prioritization and domestic was lack of security in others, and the same funding drive national ownership. One of its personnel are often responsible for activities cross-cutting targets that is especially relevant against several diseases, with different
calendars. Training is essential but should interaction, although work against similar be provided close to the time of a campaign, diseases, such as skin NTDs (15, 16), might be which is difficult for personnel working on grouped together. Local governments should several campaigns. In countries with remote have a strong role in integration, with local populations, such as in the Amazon Basin, it is and domestic resources, coordination and self- difficult to integrate activities because of lack care. Integration would augment the effects of of local participation. Parasitic diseases are isolated efforts and encourage development often addressed in community initiatives, and of mechanisms to share experience, trachoma could be integrated into primary information and support. Both public and health care, with an emphasis on WASH. private organizations should be involved, so Programmes could also cooperate in activities that each knows the role and content of each such as WASH and SAFE in schools; however, other’s programme, and they should work competing priorities restrict budgets for in coordination, especially with community workers and nursing stations, and activities organizations. Operational research should be should be more practical and adaptable. One conducted to change strategies and improve limitation to integrating trachoma activities cooperation among programmes and with with those for other NTDs is that trachoma health ministries. involves the eyes but its complications are more similar to those of leprosy and lymphatic In Nepal, a national eye organization has filariasis. Partners might therefore cooperate eliminated trachoma as a public health problem in small projects, for example trachoma and through integration and mainstreaming. leprosy. The Government is now preparing for post- validation surveillance. The action plan One participant said that mainstreaming with for post-elimination surveillance has been 6 other public health issues risked side-lining integrated into the Government health humanitarian nongovernmental organizations information management system; in addition, (NGOs) working on sight, eyes, vision and there is an opportunity for the powerful, blindness. He said that images of people with autonomous local governments to conduct local trichiasis can be a stronger advocacy tool than surveillance. Ownership at local level creates those for other NTDs. the possibility for local resource allocation for NTD programmes. Opportunities for In answer to a question on how countries integration across NTDs are being reviewed. find funding for distributing antibiotics, Dr Nepal has a national NTD road map, and non- Solomon said most countries are supplied with health sectors and NGOs are integrated into donated azithromycin (Zithromax®) by Pfizer its work, with domestic resource mobilization; through the International Trachoma Initiative, the country now plans to restructure its NTD and the health ministry often partners with steering committee to incorporate actors from NGOs to get financial support and technical non-health sectors too. Both NGO and some assistance for training health workers in how Government eye hospitals are available, and to administer the medicine and for the process the Government plans to integrate eye-care of actually distributing antibiotics. If a country services in each local government health system has difficulty in financing distribution to very and in educational establishments with the remote areas, the health ministry can apply for Department of Education. Successful activities external funding; partners will do everything require strong government leadership, careful they can to help. planning and implementation, a passionate workforce, community participation and National programmes for different NTDs are careful monitoring. often under different leadership, with little
In Togo, long-term integration of work on In response to a question about the effect of the NTDs was officially recognized 2 years ago, COVID-19 pandemic on trachoma elimination after elimination of dracunculiasis in 2011, activities, the participant from Fiji said that, as lymphatic filariasis in 2017 and human African the borders of the country had been closed, trypanosomiasis in 2020. Integrated field visits the delivery service had been remodelled to for Buruli ulcer and leprosy are particularly integrate NTDs into primary health care, with useful for achieving elimination of those a new governance structure. Other countries diseases. A recurrent problem is abandonment will have to rebuild their resilience and make by partners once a disease has been eliminated, new plans to work on eliminating trachoma. which limits support for surveillance, and the country has had to provide its own financing. Dr Solomon commented that progress is They have found that useful lessons can be still slow in a small set of districts in which learnt from other programmes. Another approaches that worked elsewhere to reduce participant commented that his country had the prevalence of active trachoma appear to found that schistosomiasis had provided a be less effective. Research is needed for these good model of experience in conducting districts. It is important to maintain delivery mass drug administration (MDA), planning, of high-quality surgery and to ensure the high training and distributing medicines. quality of prevalence surveys. He said that the goal of eliminating trachoma as a public health The end in sight: 2020 INSight, published problem by 2020 appeared to be realistic in in 2011 by the International Coalition for 1996; 2030 was a reasonable new goal, which Trachoma Control (17) has been a very many countries would achieve before that useful document in multiple ways, and it was date. Dr Resnikoff said that some donors and proposed that a similar, up-to-date document governments might find it difficult to maintain be prepared to meet the fresh challenges of the support for the new goal, and other sources 7 new road map. One participant commented of external funding would have to be found. that the transitions between programme Others said that countries would be able to phases described therein are not explicit, use the new delay to recover from COVID-19 and indicators or an explanation should be and make new plans for eliminating trachoma. provided. One participant said that one focus should be on improving the empowerment of women through behaviour change communication.
4. Report from WHO D r Solomon said that the failure to meet the 2020 targets should be acknowledged and awareness of that failure used as fuel to drive graders and to prove that they have been trained well. Follicle size guides on adhesive discs placed on thumbnails (20) help but do future work. Since 2002, the global prevalence not fully solve the problem. There is current of trachomatous trichiasis has been reduced interest in determining whether trained by 74% and the number of people living in graders could be replaced by photographs of the 8 areas in which active trachoma remains a conjunctiva (21–25) or whether the prevalence problem reduced by 91% (10). In every effort, of trachomatous inflammation—follicular the emphasis must be on excellence – for every (TF) could be augmented or replaced by patient managed for trichiasis, every interaction markers of current or previous infection (26). in which someone is given antibiotics, at every A third issue is obtaining data from national health education opportunity, in every effort surveys in order to conduct detailed secondary to improve access to water or sanitation and in analyses to identify ways to eliminate trachoma every survey. faster. The process of requesting data from health ministries of all endemic countries is, Three issues are of particular concern at global however, disproportionately time-consuming level as we make plans to achieve elimination for both national coordinators and research by 2030. First, the continuing COVID-19 teams. He asked participants for suggestions pandemic is affecting all trachoma elimination on expanding appropriate access to the data. activities, and activities in high-transmission Ending on an optimistic note, he recalled areas will have to be intensified to catch up. In that, through the RTI ENVISION Project, such areas, the NTD Modelling Consortium which closed in December 2019, 86 million has predicted that a 1-year delay in providing people are no longer at risk of trachomatous antibiotic MDA will result in a more than 2.5- blindness, and, in January 2020, Professor year delay in eliminating trachoma. Means David Mabey of the London School of Hygiene must be found to recover the lost ground (18). & Tropical Medicine was presented with the Second, survey graders are currently trained to 28th Prince Mahidol Award for Public Health, a high standard in live inter-grader agreement in recognition of his more than 30 years of exercises (19). As active trachoma disappears, work against trachoma. however, it becomes more difficult to train
5. Reports from WHO regional offices 5.1 WHO Regional Office other health issues, reach remote populations in endemic countries and support countries for Africa that have met the criteria for elimination to prepare and submit dossiers. D r Amir B. Kello reminded participants that the African Region bears 86% of the global burden of trachoma, with 117 million 9 people at risk and 26 of the 47 countries in the Region requiring interventions (10). 5.2 WHO Regional One country (Ghana) has been validated as Office for the Eastern having eliminated trachoma as a public health Mediterranean problem, and the claims of two others (Gambia and Togo) are being evaluated. Progress has Dr Supriya Warusavithana said that three been made since the previous meeting, with the countries in the Eastern Mediterranean Region population requiring A, F and E reduced by 19 (Morocco, Oman and the Islamic Republic of million, antibiotic MDA no longer required in Iran) had been validated as having eliminated seven countries, and achievement by Ethiopia trachoma as a public health problem (27), of 100% MDA coverage for trachoma (10). 10 were thought not to require interventions COVID-19 has either postponed or delayed and five to require interventions; no data trachoma surveys, disrupted planned MDA were available for three. In the five countries rounds with resulting expiry of medicines, that are known to require interventions postponed surgery for trichiasis and increased (Afghanistan, Egypt, Pakistan, Sudan and the cost of interventions by the addition of Yemen), over 10 million people require A, F precautionary measures. The priorities now are and E. Surgery for trachomatous trichiasis to resume mapping and SAFE interventions, was provided for 310 people in Pakistan and reach 100% geographical coverage of MDA, Sudan in 2019, antibiotics to over 2.3 million clear the backlog of trachomatous trichiasis people in four countries, interventions for to reach the elimination threshold, integrate F facial cleanliness in all five countries and and E with interventions for other NTDs and
environmental improvement in four (10). awaiting operation. Peru has identified a second COVID-19 has disrupted NTD interventions district in which trachoma may be a public in community and health centres and health problem, and the Bolivarian Republic surveillance and reporting by more than 50%, of Venezuela will carry out baseline surveys in whereas the effect to redirect staff, funds and nine evaluation units, with embedded studies resources to the COVID-19 response had been on serology for other communicable diseases smaller. The main challenges for the WHO and proof-of-concept integration of visual Regional Office are the complex security acuity screening. in collaboration with the situations in many countries in the Region, PEEK Vision Foundation, PEEK Vision Ltd COVID-19 restrictions, diversion of resources (28) and Tropical Data (29). A regional road and shortages of funding and capacity. The map for addressing trachoma, other NTDs and priorities are to validate elimination in Iraq other vision problems in the populations of the and Tunisia, initiate SAFE interventions in Amazon Basin has been agreed with countries Afghanistan, resume MDA in Pakistan once (30) and trachoma elimination has also been doing so is agreed to be appropriate, and included in an initiative to eliminate more than continue SAFE strategy implementation in 30 communicable diseases and conditions Egypt, Sudan and Yemen. Trachoma will be in the Region (https://www.paho.org/en/ mapped in suspected-endemic districts, and destination-elimination). Future priorities impact surveys will be conducted. Surgery, include the implementation of integrated surveillance and monitoring for trachoma NTD surveys, promotion of integrated health will be integrated into other public health services, roll-out of a virtual training course programmes, such as for the prevention of on WASH and the health sector working blindness, polio vaccination and malaria; and together to tackle trachoma and other NTDs, partnerships with other sectors for F and E will and development of innovative strategies to 10 be strengthened with UNICEF and the WHO reach remote populations. Health Emergencies cluster. 5.4 WHO Regional Office 5.3 WHO Regional Office for South-East Asia for the Americas Dr Mohamed Ahmed Jamsheed said that Dr Martha Saboyá said that trachoma is a trachoma is known to have recently been a public health problem in four countries in problem in India, Myanmar and Nepal, but the Region of the Americas, one of which is elimination of the disease as a public health planning baseline surveys. A total of 5.2 million problem has been validated in the last two. people require A, F and E interventions. Since The SAFE strategy has been continued in all the previous meeting of the Alliance, Brazil has countries, and in 2019, 918 operations for reassessed nine non-indigenous districts and trichiasis were conducted in India and 424 found a prevalence of < 5% TF in 1–9-year-olds in Nepal (10). Since the previous meeting, in all nine, and < 0.2% trachomatous trichiasis a national guideline on post-validation in ≥ 15-year-olds in eight of the nine; surveys surveillance had been issued in Nepal, and a in five indigenous evaluation units have been series of pre-validation surveillance surveys postponed because of COVID-19. Colombia is is being planned in India. Nepal is developing preparing a plan to reinforce SAFE. Guatemala an integrated NTD road map that includes has completed house-to-house searches for trachoma and is restructuring the national trichiasis cases, and the first surgery camp technical working group on trachoma into was held for 40 people; about 100 people are an NTD steering committee that includes
sectors beyond health, such as environment, might not actually be trachoma. An expert water, sanitation and education. Trachoma consultation in January 2018 recommended surveillance will be integrated into the national that the two countries undertake ancillary health information system to strengthen post- surveys to determine the proportion of validation surveillance and give access to children aged 10–14 years with trachoma- NGOs, which provide most eye care services related conjunctival scarring in communities in Nepal. Myanmar is developing a post- with a prevalence of active trachoma ≥ 30%, validation surveillance plan. while at the same time continuing to promote facial cleanliness (31). Fiji and Papua New Guinea were advised to repeat population- based baseline surveys and the same ancillary 5.5 WHO Regional Office survey (31). The ancillary surveys in the Solomon Islands and Vanuatu showed that for the Western Pacific MDA should not be continued (32), and Vanuatu has submitted a dossier claiming Dr Aya Yajima reported that 11 countries in elimination of trachoma as a public health the Region are endemic for trachoma. Three problem to WHO, which is under review. have been validated as having eliminated trachoma as a public health problem, one more Increasing use of serology (33) provides has submitted a dossier, two are conducting opportunities for integrating post-validation impact or pre-validation surveillance surveys, surveillance with surveillance for other and five are implementing the SAFE strategy diseases, such as lymphatic filariasis and or mapping (10). She said that COVID-19 is vaccine-preventable diseases. In Melanesia, largely under control in the Region. In Australia, work to eliminate yaws and to control scabies is implementation of the SAFE strategy and being accelerated, and azithromycin MDA and 11 annual screening and treatment have resulted intensified WASH delivery are planned from in major gains, although a further reduction in next year. The Regional Office is preparing a new active trachoma will require improved facial regional action plan to strengthen general eye cleanliness and better access of communities health programme capacity and infrastructure, and households to washing facilities; trachoma including trachoma elimination. activities were halted for the first half of the year because of the COVID-19 pandemic. Discussion Viet Nam has a long history of fighting against trachoma. After pre-validation surveillance In the discussion that followed the regional identified hotspots in one province, the SAFE office presentations, clarifications were given strategy was initiated, and it is hoped that a post- about the trachoma situation in countries in MDA impact survey will allow Viet Nam to North Africa. Intensified post-elimination prepare a dossier for validation of elimination. surveillance is being conducted in Morocco. After trachoma mapping, Solomon Islands Speakers suggested that another means be and Vanuatu started implementation of the found to validate elimination of trachoma as SAFE strategy and MDA; however, post- a public health problem in Iraq, Tunisia and MDA surveys showed limited impacts on the Saudi Arabia; however, Dr Solomon recalled prevalence of trachoma. While the prevalence the importance of consistent criteria for of TF in children aged 1–9 years is ≥ 5%, the validating elimination (34). In Algeria, the prevalence of trachomatous trichiasis in those population in areas most strongly suspected aged ≥ 15 years is low, and evidence of current of being endemic for trachoma should be ocular infection with Chlamydia trachomatis is surveyed. rare. This implies that TF in parts of Melanesia
With regard to integration of trachoma In answer to a question about the post- activities with those for other diseases, several validation activities to be included in previously speakers recognized that general hygiene trachoma-endemic indigenous communities and sanitation are the basis of programmes in South America, Dr Solomon replied that against many NTDs. Therefore, trachoma access to personal and environmental hygiene should not be integrated with other eye health is essential. programmes. Dr Solomon commented that, although SAFE is considered an integrated Dr Kello said that preliminary investigations on strategy, it could perhaps be better thought of endemicity of trachoma had been carried out as S in relation to management of individuals in Angola, Botswana and Namibia. In Angola, who already have trichiasis and A, F and E there are recommendations for baseline for the population-level prevention of future population-based surveys; in Botswana, it is cases of trichiasis. One participant pointed out recommended to conduct a population-based that there is an imperfect correlation between survey in Ngamiland district; and in Namibia, the number of people with trichiasis and the baseline population-based surveys are needed number of people who need treatment with and are currently being planned. antibiotics (35). He proposed that a document be prepared specifically on surveillance, both In answer to Dr Solomon’s request for during and after validation. suggestions on acquiring data from countries in order to conduct secondary analyses, Dr At the time of the meeting, COVID-19 had Saboyá said that she would try to schedule delayed trachoma activities by 6–9 months, a meeting of the managers of trachoma and the effect of those delays is likely to become programmes in the Region of the Americas to more apparent in 2021. Another aspect of the determine what they require from WHO and 12 pandemic is the cost of personal protective to discuss how their data would be interpreted. equipment.
6. Reports from partners 6.1 International Coalition Diamond Jubilee Trust Trachoma Initiative and the DFID-SAFE Trachoma Programme. for Trachoma Control These initiatives have been coordinated with ENVISION/USAID and the ITI/Pfizer drug M r Scott McPherson recalled that the Coalition (ICTC, https://www. trachomacoalition.org/) was conceived in 2004, donation programmes, allowing the SAFE strategy to be extended widely throughout trachoma-endemic countries. Together, those 13 initially to bring together implementing NGOs investments have achieved significant gains and donor organizations immediately after the against trachoma, generated further evidence annual meetings of the GET2020 Alliance to on how to best implement programmes and discuss how to support implementation of attracted additional donors. 2020 INSight the recommendations of the Alliance. ICTC helped to position investment for trachoma currently comprises 51 nongovernmental, according to the best data available at that donor, private sector and academic time and shaped the strategic direction of the organizations that support the Alliance Coalition. and implementation of the SAFE strategy. Members add value by supporting national COVID-19 has stimulated innovation and programmes comprehensively, sharing annual demonstrated the adaptability of health work plans to avoid duplication of effort programmes, and the trachoma community and maximize efficiency, documenting joint should learn from other groups, including the operational effectiveness, identifying gaps in eye health community, to strengthen its work. implementation and preparing joint funding Multisectoral engagement among sectors proposals. In 2011, ICTC published, The end that address WASH, inclusion of people with in sight: 2020 INSight (17), which describes the disabilities, education and nutrition, with actions thought then to be needed to achieve hard science and advocacy, are essential. The global elimination of trachoma as a public narrative will have to be reframed for the “final health problem by 2020. The document boosted mile”, to move from control to elimination of trachoma programmes (36), contributed trachoma as a public health problem, extending to bringing about the Global Trachoma it beyond trachoma to common issues of Mapping Project (37, 38) and attracted sustainability, continuous surveillance and two large initiatives: the Queen Elizabeth effective health system strengthening. A new
generation of leaders in the NTD community by 2030. Azithromycin will be provided in should be identified, engaged and empowered the quantities required (40), including for in research, programmes, campaigns, policy countries that will be attempting to complete and advocacy, with poverty alleviation, cross- all their activities for 2020 and 2021 in 1 year border issues and insecure states addressed in to catch up the time lost to COVID-19. For order to leave no one behind. The trachoma countries with high prevalence populations community must continue to identify gaps and that have been most severely affected by financial and other requirements for scaling up missed treatment rounds, such as Ethiopia the global programme, supported by evidence, (41, 42), where more rounds of MDA, perhaps updating the cost of implementing the SAFE given more frequently than annually (43, 44), strategy and supporting advocacy to integrate may be necessary, support will be provided. trachoma into eye health and wider health Future empirical trials should be structured to systems. In a world where we will have to provide clear evidence of effect, with enhanced achieve more for less in light of the economic surveillance. He noted that the Trachoma Atlas repercussions of COVID-19, we must work (https://www.trachomaatlas.org/) has been together towards common goals such as the improved, with greater functionality and clean Sustainable Development Goals and universal interfaces. The website will continue to evolve. health coverage. ICTC will develop a new resource for identifying gaps, built on the GET2020 6.3 Tropical Data Alliance Plan of Action (39), 2020 INSight (17) and alignment with the NTD road map 2021– Dr Emma Harding-Esch said that the Tropical 2030 (12). Sustaining elimination efforts will Data initiative (www.tropicaldata.org) consists 14 require addressing systemic challenges such of six partners, which support national as governance, financing, health access and programmes in conducting standardized, health inequity. Strengthening health systems epidemiologically robust prevalence surveys, for the control and elimination of NTDs from protocol review to results provision. The will require a broader, systemic approach, interests of the countries in which surveys are including sustainable data collection systems conducted are protected, as the methods and to monitor progress. data belong to their health ministries, and quality is assured and controlled throughout (19), maximizing the likelihood of reliable data for programmatic decision-making. Since 6.2 International Trachoma 2016, Tropical Data has supported 2025 surveys Initiative in 43 countries. These include baseline, impact and pre-validation surveillance surveys as Dr Paul Emerson commented that the goals well as trachomatous trichiasis-only surveys; that were set for 2020 are unchanged. To the combined number of people examined in achieve the goal by 2030, programmes and evaluation units surveyed with Tropical Data supporting organizations should be “bigger, support to date totals > 6 million residents. better and faster” and based on the best science Data on TF prevalence in children aged 1–9 and the best management. Trachoma activities years have resulted in 151 172 521 antibiotic should be integrated with those of other disease treatments. MDA can now be stopped in 596 programmes only if that helps to achieve the evaluation units and it is not necessary to start elimination goal. All the necessary elements it in 308. Surveys have also helped countries are available for eliminating trachoma globally to confirm completion of pre-validation
surveillance in 377 evaluation units. Since the reviewed journals. Its plans include continuing previous meeting of the Alliance, Tropical Data to provide existing services, participation in has conducted refresher training of trainers, operational research and providing support updated its tools and resources and provided for quality-assured, quality-controlled surveys support for publication of articles in peer- for other NTDs. 15
7. Report from the Trachoma Scientific Informal Workshop M r Harran Mkocha, Director of the Kongwa Trachoma Project in the United Republic of Tanzania, reported for personal protective equipment have been assessed, including use of face shields during trichiasis surgery. One group reported highlights from the 2020 Trachoma Scientific successful training in trichiasis surgery during Informal Workshop. One study was reported the pandemic after using the WHO risk in which the association between severity assessment and mitigation tool. 16 of trachomatous scarring of the conjunctiva and severity of trichiasis was confirmed. In a study of weekly practice with the HEAD Discussion START system, with remote monitoring by senior ophthalmologists, both trainees and In the discussion that followed the monitors considered that regular practice presentations, one participant commented that and feedback were beneficial. A promising the serological tests described indicate whether procedure for management of post-operative a person has been exposed and not whether trichiasis is being evaluated in a clinical trial in they are currently infected. Their specificity is Ethiopia. In countries in which trachoma has about 98% and their precision good, with close not been empirically mapped because disease agreement among laboratories; the limit of at the level of a public health problem was detection is being determined. not suspected, desk reviews can be conducted for systematic collection of evidence to In reply to a question about the approach to support claims of elimination or to identify be taken in areas of persistent active trachoma, areas in which mapping or an intervention is which were seen even before COVID-19, Dr necessary, while strong donor support is still Emerson said that, although all the necessary available. Several sources of data should be supplies of medicines are available, ITI cannot used; however, only enough data should be pay for enhanced surveillance. Dr Solomon collected to decide whether there is a rationale suggested that recovery from COVID-19 to conduct mapping. The anti-C. trachomatis be linked to the question of how to manage antibody testing platforms available for sero- trachoma in hyperendemic areas, in a trial surveillance are bead-based assays, ELISA and conducted with intensive treatment. Such lateral flow assays. With regard to precautions operational research might demonstrate the to be taken against COVID-19, various options role of ongoing C. trachomatis transmission in
districts in which the TF prevalence at impact One speaker pointed out that trichiasis is or surveillance surveys is ≥ 5%. Dr Emerson present in more than 50 districts in Sudan; said that the response of national programmes however, there is no programme in many should remain the SAFE strategy, which has of those districts, as trachoma has not been been proven. Persistence of disease could demonstrated to be a public health problem indicate that the strategy is not being adhered through population-based surveys. A further to everywhere, and standardized surveys complication is the arrival of large numbers of should be conducted. refugees from the Tigray Province in Ethiopia. In a discussion about whether the name One participant commented that the “GET2020” should now be changed to combination of Vision 2020, the Sustainable GET2030, the consensus was to maintain Development Goals and the NTD road map 2020 because of the connotation of good 2021–2030 would spur activity for reaching visual acuity. Dr Solomon added that legal the new 2030 goal. considerations might make changing the name complicated; furthermore, maintaining A question was raised about whether some 2020 in the name would be a reminder that the districts or countries have not yet been deadline had been missed and would convey validated as having eliminated trachoma as a a sense of urgency. Dr Emerson agreed: the public health problem because they have had name would help to keep up the momentum difficulty in meeting the trichiasis prevalence and raise ambition. The achievements made criterion for elimination. Dr Solomon said that up to 2020 should be used as a springboard to evidence had to be provided that trichiasis is no go further. longer a public health problem. Geostatistical approaches are being explored to try to obtain After the usual exchange of courtesies, the more precise estimates of trichiasis prevalence. meeting was closed. 17
References 1. WHO validates Myanmar for eliminating Organization. World Health Organization; trachoma as a public health problem. In: 1962 (WHO Technical Report Series, No. WHO news [website]. Geneva: World 234; https://apps.who.int/iris/bitstream/ Health Organization; 2020 (https://www. handle/10665/40526/WHO_TRS_234. who.int/news/item/17-09-2020-who- pdf, accessed 17 February 2021). validates-myanmar-for-eliminating- 6. Thylefors B, Dawson CR, Jones BR, 18 trachoma-as-a-public-health-problem, West SK, Taylor HR. A simple system accessed 17 February 2021). for the assessment of trachoma and its 2. Resolution WHA3.22. Trachoma. In: 3rd complications. Bull World Health Organ. World Health Assembly, Geneva, 25 May 1987;65(4):477-83. 1950. Resolutions and decisions, annexes. 7. Francis V, Turner V. Achieving Geneva: World Health Organization; 1950 community support for trachoma control. (https://www.paho.org/en/documents/ Geneva: World Health Organization; wha322-trachoma-1950, accessed 17 1993 (https://www.ircwash.org/sites/ February 2021). default/files/203.2-16920.pdf, accessed 17 3. Expert committee on trachoma: first report. February 2021). Geneva: World Health Organization; 8. Bailey RL, Arullendran P, Whittle HC, 1952 (WHO Technical Report Series, No. Mabey DC. Randomised controlled trial of 59; (https://apps.who.int/iris/bitstream/ single-dose azithromycin in treatment of handle/10665/40199/WHO_TRS_59.pdf, trachoma. Lancet. 1993;342(8869):453-6. accessed 17 February 2021). 9. Future approaches to trachoma control: 4. Expert committee on trachoma: report of a global scientific meeting, second report. Geneva: World Health Geneva, 17-20 June 1996. Geneva: Organization; 1956 (WHO Technical World Health Organization, 1997 Report Series, No. 106; https://apps.who. https://apps.who.int/iris/bitstream/ int/iris/bitstream/handle/10665/40360/ handle/10665/63413/WHO_PBL_96.56. WHO_TRS_106.pdf, accessed 17 pdf, accessed 17 February 2021). February 2021). 10. WHO Alliance for the Global Elimination 5. Expert committee on trachoma: of Trachoma by 2020: progress report, 2019. third report. Geneva: World Health Wkly Epidemiol Rec. 2020;30(95):349-60.
11. Accelerating work to overcome the global 19. Solomon AW, Willis R, Pavluck AL, impact of neglected tropical diseases: a Alemayehu W, Bakhtiari A, Bovill S, et al. roadmap for implementation. Geneva: Quality assurance and quality control in World Health Organization; 2012 (https:// the Global Trachoma Mapping Project. www.who.int/neglected_diseases/NTD_ Am J Trop Med Hyg. 2018;99(4):858-63. RoadMap_2012_Fullversion.pdf, accessed doi:10.4269/ajtmh.18-0082. 17 February 2021). 20. Solomon AW, Le Mesurier RT, Williams 12. Ending the neglect to attain the WJ. A diagnostic instrument to help Sustainable Development Goals: a road field graders evaluate active trachoma. map for neglected tropical diseases Ophthalmic Epidemiol. 2018:1-4. doi:10.1 2021–2030. Geneva: World Health 080/09286586.2018.1500616. Organization; 2020 (https://apps.who.int/ 21. West SK, Taylor HR. Reliability of iris/handle/10665/338565, accessed 17 photographs for grading trachoma in field February 2021). studies. Br J Ophthalmol. 1990;74(1):12-3. 13. World Health Assembly. World Health 22. Solomon AW, Bowman RJ, Yorston D, Assembly decision 73(33): Neglected Massae PA, Safari S, Savage B, et al. Tropical Diseases. 2020. Operational evaluation of the use of 14. World report on vision. Geneva: World photographs for grading active trachoma. Health Organization; 2019 (https:// Am J Trop Med Hyg. 2006;74(3):505-8. www.who.int/publications/i/item/world- doi:10.4269/ajtmh.2006.74.505. report-on-vision, accessed 17 February 23. Gebresillasie S, Tadesse Z, Shiferaw A, 2021). Yu SN, Stoller NE, Zhou Z, et al. Inter- 15. Engelman D, Fuller LC, Solomon AW, rater agreement between trachoma McCarthy JS, Hay RJ, Lammie PJ, et al. graders: comparison of grades given 19 Opportunities for integrated control of in field conditions versus grades from neglected tropical diseases that affect the photographic review. Ophthalmic skin. Trends Parasitol. 2016. doi:10.1016/j. Epidemiol. 2015;22(3):162-9. doi:10.3109 pt.2016.08.005. /09286586.2015.1035792. 16. Mitjà O, Marks M, Bertran L, Kollie K, 24. Kim MC, Okada K, Ryner AM, Amza Argaw D, Fahal AH, et al. Integrated A, Tadesse Z, Cotter SY, et al. Sensitivity control and management of neglected and specificity of computer vision tropical skin diseases. PLoS Negl Trop classification of eyelid photographs for Dis. 2017;11(1):e0005136. doi:10.1371/ programmatic trachoma assessment. PLoS journal.pntd.0005136. One. 2019;14(2):e0210463. doi:10.1371/ 17. The end in sight: 2020 INSight. Atlanta journal.pone.0210463. (GA): International Coalition for 25. Nesemann JM, Seider MI, Snyder BM, Trachoma Control; 2011 (https://www. Maamari RN, Fletcher DA, Haile BA, et al. trachomacoalition.org/sites/default/ Comparison of smartphone photography, files/content/resources/files/ICTC_ single-lens reflex photography, and field- EnglishJuly21lowres.pdf, accessed 17 grading for trachoma. Am J Trop Med February 2021). Hyg. 2020;103(6):2488-91. doi:10.4269/ 18. NTD Modelling Consortium. The potential ajtmh.20-0386. impact of programmes interruptions due 26. Report of the 4th global scientific meeting to COVID-19 on 7 neglected tropical on trachoma, Geneva, 27–29 November diseases: a modelling-based analysis 2018. Geneva: World Health Organization; [version 1; not peer reviewed]. Gates 2019 (https://apps.who.int/iris/bitstream/ Open Res. 2020;4:115. doi:10.21955/ hand le / 1 0 6 6 5 / 3 2 5 1 2 1 / W HO - C D S - gatesopenres.1116665.1. NTD-PCT-2019.03-eng.pdf, accessed 17 February 2021).
27. Trachoma elimination: Iranians triumph 33. Martin DL, Saboya-Diaz MI, Abashawl against the world’s leading infectious A, Alemayeh W, Gwyn S, Hooper PJ, cause of blindness. In: Neglected et al. The use of serology for trachoma Tropical Diseases [WHO health topics surveillance: Current status and priorities media release]. Geneva: World Health for future investigation. PLoS Negl Trop Organization; 2018 (https://www.who.int/ Dis. 2020;14(9):e0008316. doi:10.1371/ neglected_diseases/news/Trachoma-Iran- journal.pntd.0008316. triumph-against-blindness/en/, accessed 34. Validation of elimination of trachoma 17 February 2021). as a public health problem. Geneva: 28. Bastawrous A, Rono HK, Livingstone World Health Organization; 2016 IA, Weiss HA, Jordan S, Kuper H, et (https://apps.who.int/iris/bitstream/ al. Development and validation of a handle/10665/208901/WHO-HTM- smartphone-based visual acuity test NTD-2016.8-eng.pdf, accessed 17 (peek acuity) for clinical practice and February 2021). community-based fieldwork. JAMA 35. Flueckiger RM, Giorgi E, Cano J, Ophthalmol. 2015;133(8):930-7. Abdala M, Amiel ON, Baayenda G, et al. doi:10.1001/jamaophthalmol.2015.1468. Understanding the spatial distribution 29. Tropical Data: a WHO-led initiative to of trichiasis and its association with help national programmes collect and trachomatous inflammation—follicular. do more with their data. In: Trachoma BMC Infect Dis. 2019;19(1):364. [WHO health topics web release]. Geneva: doi:10.1186/s12879-019-3935-1. World Health Organization; 2016 (http:// 36. Courtright P, Rotondo LA, MacArthur www.who.int/trachoma/news/News_ C, Jones I, Weaver A, Negash BK, et al. 20 Trachoma_Tropical_Data_launch/en/, Strengthening the links between mapping, accessed 21 February 2021). planning and global engagement for disease 30. An integrated approach to trachoma, elimination: lessons learnt from trachoma. other neglected infectious diseases, and Br J Ophthalmol. 2018;102(10):1324-7. eye diseases that can cause blindness in doi:10.1136/bjophthalmol-2018-312476. remote Amazon populations: meeting 37. Solomon AW, Kurylo E. The Global report (Panama City, 21-22 October Trachoma Mapping Project. Community 2019). Washington (DC): Pan American Eye Health. 2014;27(85):18. Health Organization (https://iris.paho. 38. Strachan CE. Independent report: org/handle/10665.2/52508, accessed 17 evaluation of Global Trachoma July 2021). Mapping Project London: United 31. Expert consultation on the elimination Kingdom Department for International of trachoma in the Pacific. Melbourne, Development; 2017 (https://www.gov. 17-19 January 2018). Manila: WHO uk/government/publications/evaluation- Regional Office for the Western Pacific; of-global-trachoma-mapping-project, 2018 (https://apps.who.int/iris/bitstream/ accessed 17 February 2021). handle/10665/325940/RS-2018-GE-02- 39. World Health Organization Alliance for AUS-eng.pdf, accessed 17 February 2021). the Global Elimination of Trachoma by 32. Butcher R, Tagabasoe J, Manemaka J, Bong 2020. Eliminating trachoma: accelerating A, Garae M, Daniel L, et al. Conjunctival towards 2020. London: International scarring, corneal pannus and Herbert’s Coalition for Trachoma Control; 2016. pits in adolescent children in trachoma- 40. Emerson PM, Hooper PJ, Sarah V. endemic populations of the Solomon Progress and projections in the program Islands and Vanuatu. Clin Infect Dis. 2020. to eliminate trachoma. PLoS Negl Trop doi:10.1093/cid/ciaa1151. Dis. 2017;11(4):e0005402. doi:10.1371/ journal.pntd.0005402.
41. Nash SD, Astale T, Nute AW, Bethea D, 43. Melese M, Alemayehu W, Lakew T, Yi Chernet A, Sata E, et al. Population-based E, House J, Chidambaram JD, et al. prevalence of Chlamydia trachomatis Comparison of annual and biannual mass infection and antibodies in four districts antibiotic administration for elimination with varying levels of trachoma endemicity of infectious trachoma. JAMA. in Amhara, Ethiopia. Am J Trop Med 2008;299(7):778-84. doi:299/7/778 [pii] Hyg. 2020;104(1)207-15. doi:10.4269/ 10.1001/jama.299.7.778. ajtmh.20-0777. 44. Biebesheimer JB, House J, Hong KC, Lakew 42. Nash SD, Chernet A, Moncada J, Stewart T, Alemayehu W, Zhou Z, et al. Complete AEP, Astale T, Sata E, et al. Ocular local elimination of infectious trachoma Chlamydia trachomatis infection and from severely affected communities after six infectious load among pre-school aged biannual mass azithromycin distributions. children within trachoma hyperendemic Ophthalmology. 2009;116(11):2047- districts receiving the SAFE strategy, 50. doi:S0161-6420(09)00469-2 [pii] Amhara region, Ethiopia. PLoS Negl Trop 10.1016/j.ophtha.2009.04.041. Dis. 2020;14(5):e0008226. doi:10.1371/ journal.pntd.0008226. 21
Annexes ANNEX1: AGENDA Monday, 30 November 2020 (session 1) Time (GMT+1) Topic Speakers / Facilitators 14:00–14:10 Opening and welcome Ren Minghui (WHO) 14:10–14:15 Purpose, outcome and outputs of Anthony Solomon (WHO) meeting Nomination of officers Adoption of agenda Chair 14:15–14:45 The WHO Alliance for GET2020: Serge Resnikoff (OPC) 1996–2020 14:45–15:15 The NTD road map 2021–2030 Mwele Malecela (WHO) 22 15:15–16:00 Panel Selected country representatives 16:00–17:00 Discussion All Tuesday, 1 December 2020 (session 2) Time (GMT+1) Topic Speakers / Facilitators 14:00–14:10 WHO report Anthony Solomon (WHO) 14:10–15:00 Regional reports Amir Kello (AFRO) Supriya Warusavithana (EMRO) Martha Idalí Saboyá-Díaz (PAHO) Mohamed Jamsheed (SEARO) Aya Yajima (WPRO) 15:00–15:45 Discussion All 15:45–15:55 International Coalition for Trachoma Scott McPherson (ICTC) Control report 15:55–16:05 International Trachoma Initiative report Paul Emerson (ITI) 16:05–16:15 Tropical Data report Emma Harding-Esch (LSHTM) 16:15–15:25 Trachoma Scientific Informal Workshop Harran Mkocha (KTP) report 16:25–16:55 Discussion All 16:55–17:00 Closure Chair
ANNEX 2. LIST OF PARTICIPANTS Ange Elvis Aba, FHI 360, Abidjan, Côte d’Ivoire Gilbert Baayenda, Ministry of Health, Kampala, Aida Abashawl, Berhan Public Health and Eye Uganda Care Consultancy, Addis Ababa, Ethiopia Robin Bailey, London School of Hygiene & Agatha Aboe, Sightsavers, Accra, Ghana Tropical Medicine, London, United Kingdom Aparna Adams, International Coalition for Ana Bakhtiari, ITI/Tropical Data, Atlanta, United Trachoma Control, London, United Kingdom States of America Moses Aderogba, RTI International, Abuja, Kira Barbre, The Task Force for Global Health, Nigeria Decatur, United States of America Oluwole Afolayan, Federal Ministry of Health, Colin Beckwith, Sightsavers, Atlanta, United Abuja, Nigeria States of America Fentahun Akale, Crown Agents, Addis Ababa, Suzannah Bell, Moorfields Eye Hospital, London, Ethiopia United Kingdom Kossi Amevor Alaglo, Programme National des Jerome Bernasconi, Organisation pour la Maladies Tropicales Négligées, Lomé, Togo Prevention de la Cécité, Paris, France Mutasim Albattah, First Moscow State Medical Jean-Eudes Biao, Organisation pour la University, Irbid, Jordan Prevention de la Cécité, N’Djamena, Chad Wondu Alemayehu, The Fred Hollows Seth Blumberg, UCSF, San Francisco, United Foundation, Arlington, United States of America States of America Menbere Alemu, ITI, Task Force for Global Sophie Boisson, World Health Organization, Health, Addis Ababa, Ethiopia Geneva, Switzerland. Esmael Ali, London School of Hygiene & Tropical Sarah Boyd, ITI/Tropical Data, Decatur, United Medicine, London, United Kingdom States of America 23 Najeebullah Alizoi, HealthNet TPO, Kabul, Amanda Bradica, The Task Force for Global Afghanistan Health, Decatur, United States of America Tawfik Al-Khateeb, Ministry of Health, Sana’a, Clara Burgert, RTI International, Washington, Yemen United States of America Angel Alvarez, OPS, Caracas, Bolivarian Republic Simon Bush, Sightsavers, Chippenham, United of Venezuela Kingdom Juliana Amanyi-Enegela, CBM International, Robert Butcher, London School of Hygiene & Cambridge, United Kingdom Tropical Medicine, London, United Kingdom Khaled Amer, Ministry of Health, Cairo, Egypt Laura Cane, RTI International, Washington, United States of America Shyamala Anand, American Leprosy Missions, Hyderabad, India Ismat Chaudhry, Pakistan Institute of Ophthalmology, Pakistan Molly Anderson, The END Fund, Brooklyn, United States of America Amel Chebbi, Hedi Rais Institute of Ophthalmology, Tunis, Tunisia Liuzer Aragie, The Carter Center, Addis Ababa, Ethiopia Xinyi Chen, Dana Center, Johns Hopkins Wilmer Eye Institute, Baltimore, United States of America Miguel Aragon, PAHO, Brasilia, Brazil Karen Ciceri-Reynolds, World Health Elham Ashrafi, Translational Ophthalmology Organization, Geneva Switzerland Research Center, Farabi Eye Hospital, Tehran, Iran (Islamic Republic of) Joseph Cook, University of North Carolina, Chapel Hill, United States of America Kingsley Asiedu, World Health Organization, Geneva, Switzerland Paul Courtright, Kilimanjaro Centre for Community Ophthalmology, San Diego, United Zahid Awan, CBM, Islamabad, Pakistan States of America Nebiyu Ayele, Addis Ababa, Ethiopia
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