Dengue cases in the Americas have reached an all-time high

Infections with the mosquito-borne virus are surging worldwide

Mosquito control worker in Brazil

A worker collects Aedes aegypti mosquito larva in Salvador, Brazil, in July. Ridding homes and neighborhoods of pools of standing water, where mosquitoes breed, can help to stop the spread of dengue.

Joa Souza/Shutterstock

The Americas set a gloomy record in 2019: the most dengue cases ever reported.