ImmunizationEconomics.org is a resource for organizations and individuals involved in the field of immunization economics. The site was originally created in 2015 as part of the EPIC project with funding from the Bill & Melinda Gates Foundation and has key collaborators from the Harvard T.H. Chan School of Public Health, Johns Hopkins University, ThinkWell, and Results for Development. It includes information on immunization value, costing, financing, and efficiency.