The Brief

LOS ANGELES - Los Angeles County has confirmed its first locally acquired case of dengue fever of the 2025 season.

What we know:

The county’s Department of Public Health reported that an unidentified San Gabriel Valley resident developed symptoms of dengue fever in late September.

The individual did not travel to an area where the virus is endemic, indicating the infection was acquired locally.

The patient is recovering from the illness.

Dengue is a mosquito-borne illness transmitted primarily by the bite of an infected Aedes mosquito.

Symptoms can include fever, headache, muscle pain, rash, and mild bleeding. In rare, severe cases, the illness can cause shock and organ impairment.

The backstory:

The case marks the first locally acquired infection of the 2025 mosqu

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