A measles outbreak in the Federated States of Micronesia (FSM) in 2014, causing nearly 400 confirmed cases, cost nearly US$4 million (around US$10,000 per case), 88% of which was for a mass vaccination campaign, outbreak investigations, and other containment costs. While the U.S. government covered 2/3 of the costs, the economic burden to FSM — in labor and other costs of containing the outbreak, the direct costs of illness, and productivity losses — were the equivalent of the country’s entire education budget for one year.