Four things to know about malaria cases in the United States

The risk of local transmission in the United States remains extremely low

A close up photo of a mosquito resting on a person's finger.

Anopheles freeborni (pictured) is one of many mosquitoes in the United States capable of transmitting malaria from person to person.

James Gathany/CDC

For the first time in 20 years, five people have picked up malaria on U.S. soil.

On June 26, the U.S. Centers for Disease Control and Prevention issued a health advisory, announcing that over the last two months four people in Sarasota County, Fla, and one person in Cameron County, Texas, had developed the mosquito-borne illness.