About the Authors

Esmael Habtamu

Affiliations London School of Hygiene and Tropical Medicine, London, United Kingdom, The Carter Center, Addis Ababa, Ethiopia

Saul N. Rajak

Affiliation London School of Hygiene and Tropical Medicine, London, United Kingdom

Teshome Gebre

Affiliation The Carter Center, Addis Ababa, Ethiopia

Mulat Zerihun

Affiliation The Carter Center, Addis Ababa, Ethiopia

Asrat Genet

Affiliation The Amhara Regional Health Bureau, Bahir Dar, Ethiopia

Paul M. Emerson

Affiliation The Carter Center, Atlanta, Georgia, United States of America

Matthew J. Burton

matthew.burton@lshtm.ac.uk

Affiliation London School of Hygiene and Tropical Medicine, London, United Kingdom

Competing Interests

Several Carter Center employees (TG, MZ, PM) received salary funding to deliver the Lions-Carter Center SightFirst Initiative trachoma control programme, part of which is the subject of this study.

Author Contributions

Conceived and designed the experiments: EH SNR TG MZ AG PME MJB. Performed the experiments: EH. Analyzed the data: EH SNR MJB. Wrote the paper: EH MJB. Edited the paper: SNR TG MZ AG PME.