1. Pandemic and Epidemic Diseases Department, World Health Organization, Geneva, Switzerland.
2. University of the Philippines Manila-National Institutes of Health, Manila, Philippines.
3. Delivering Oral Vaccine Effectively (DOVE), Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe Street, Baltimore, MD 21205, United States of America (USA).
4. United Nations Children’s Fund, United Nations Plaza, New York, USA.
5. National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam.
6. Epicentre, Paris, France.