MARCH 18, 2025

Higher Case Counts, More Serious Illness in Puerto Rico Dengue Outbreak; CDC Issues Alert

By Ethan Covey

The CDC’s Health Alert Network issued an alert about the ongoing risk for dengue virus (DENV) infections and updated its testing recommendations in the United States.

The CDC said dengue activity remains high in some parts of the United States, particularly Puerto Rico and the U.S. Virgin Islands; local transmission of DENV also has been reported in California, Florida and Texas. Globally, many countries are reporting a higher-than-usual number of cases, which travelers