(Photo – James Gathany, CDC)
The Los Angeles County Department of Public Health has confirmed the first human cases of West Nile virus (WNV) infection for the 2025 season.
By News Desk
Four individuals were hospitalized with WNV-related illness between late July and late August. All are currently recovering. The cases were identified in residents from the Antelope Valley, San Fernando Valley, and central Los Angeles areas.
West Nile virus is transmitted through the bite of an infected mosquito. Symptoms can range from fever, headache, nausea, and body aches to more serious neurological complications such as meningitis, encephalitis, paralysis, and even death. While anyone can become infected, adults over the age of 50 and individuals with chronic health conditions face a higher risk of developing severe illness.
“The first human cases of West Nile virus are an important reminder that we all need to take steps to prevent mosquito bites and mosquito breeding,” said Dr. Muntu Davis, Los Angeles County Health Officer. “Mosquitos thrive in hot weather, increasing the risk of bites and mosquito-borne diseases.”
Dr. Davis urged residents to take the following precautions:
- Use insect repellent on yourself and your family.
- Eliminate standing water around your home to prevent mosquito breeding.
- Ensure that window and door screens are intact to keep mosquitoes out.
Public Health reports an average of 56 human WNV cases each year in Los Angeles County, though the actual number is believed to be significantly higher due to underreporting. Most infected individuals show mild or no symptoms. Approximately 75% of reported cases experience severe disease, and about 10% of those with severe illness die from complications. These figures exclude cases in Long Beach and Pasadena, which are reported by their respective local health departments.
For more information on West Nile virus symptoms and prevention tips, visit this link.
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