Summary
Malaria has returned to the United States after two decades, with ten cases reported between May and December 2023 in Florida, Texas, Maryland, and Arkansas. The outbreaks were linked to warmer temperatures and increased mosquito breeding, but all cases were quickly contained.
Key Facts
- Malaria cases emerged in the U.S. for the first time in 20 years.
- Ten people were infected in Florida, Texas, Maryland, and Arkansas in 2023.
- The infections were from local mosquito bites, not international travel.
- Two different malaria species were identified: Plasmodium vivax and Plasmodium falciparum.
- Warmer temperatures and more standing water from heavy rains helped mosquitoes breed.
- The National Oceanic and Atmospheric Administration confirmed 2023 as the warmest year on record globally.
- Strong mosquito control efforts previously kept malaria at bay in the U.S.
- Health experts warn of higher future risks in warm, humid areas with mosquito habitats.
