CDC Warns About an Elevated Risk of Dengue Fever

Symptoms usually start between four and 10 days after being bitten by an infected mosquito, health officials say.

The Centers for Disease Control and Prevention headquarters in Atlanta on April 23, 2020. (Tami Chappell/AFP via Getty Images

The U.S. Centers for Disease Control and Prevention on Tuesday sent an alert to health officials and providers about relatively elevated levels of dengue fever cases.

“Dengue activity remains high in some parts of the United States and globally, with many countries reporting higher-than-usual numbers of dengue cases in 2024 and 2025,” the CDC warned in a bulletin.