Costa Rica is seeing another increase in human screwworm infections, with coastal provinces among the most affected areas as health officials warn people not to ignore cuts, sores, and other open wounds. The latest figures show 16 confirmed human cases in the opening weeks of 2026, up from 12 cases recorded by epidemiological week 6 and 7 cases by week 4, according to Health Ministry surveillance data. The strongest concentration has been in the Pacific Central region, and recent Costa Rican reporting shows Puntarenas now leads the country in confirmed human cases. Puntarenas had six confirmed cases as of March 17, followed by Heredia with three. San José, Alajuela, and Limón each had two cases, while Guanacaste had one. That puts two coastal provinces, Puntarenas and Limón, on the current map of active infections, while Guanacaste also remains affected. The rise has kept pressure on Costa Rica’s health system because screwworm is not a minor skin problem. The condition is caused b...