1. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
2. Bal Umang Drishya Sanstha, New Delhi 110016, India
3. International Vaccine Access Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
4. St. George’s University Hospital NHS Foundation Trust, London SW17 0QT, UK
5. Continua Kids, New Delhi 110034, India