According to Costa Rica's Ministry of Health, 60 cases of Plasmodium falciparum malaria have been reported since January 1, 2023, in Limón Province, mainly in Pococí (32 cases) and Limón (26 cases) cantons; cases have also been reported in Siquirres (1 case) and Matina (1 case) cantons. More than half of these cases have been reported since March 26, 2023. Shoreland now recommends chemoprophylaxis (atovaquone-proguanil, chloroquine, doxycycline, mefloquine, or tafenoquine) for all travelers going to Pococí, Limón, Siquirres, and Matina cantons, including all cities and towns within these areas. Travelers should observe insect precautions in areas with any level of transmission.