HAPIN Trial centers are located in four countries:

In Guatemala, the research center is based at Universidad del Valle de Guatemala in Guatemala City and led by John McCracken and Lisa Thompson.

In India, the research center is based at Sri Ramachandra Institute of Higher Education and Research in Chennai and is led by Kalpana Balakrishnan and Thangavel Gurusamy.
In Peru, the research center is being established by Johns Hopkins University in collaboration with AB PRISMA in Puno and the Universidad Peruana Cayetano Heredia in Lima, and is led by William Checkley and Marilu Chiang.
In Rwanda, the research center is being established by the London School of Hygiene & Tropical Medicine and is led by Ghislaine Rosa.

Principal Investigators

The overall study is led by three Principal Investigators: