West Nile Virus Cases in San Diego County Hit 10-Year High

San Diego, CA, September 25, 2026 —

San Diego County is experiencing its highest number of West Nile virus cases in a decade. The trend marks a significant increase in the presence of the mosquito-borne illness within the region.

Specific details regarding the exact number of cases, the timeline over which this 10-year high was established, or the particular months during which these cases occurred were not immediately available in the provided summary.

West Nile virus is typically transmitted to humans through the bite of an infected mosquito. While many people infected with the virus do not develop symptoms, a subset can experience more severe neurological illness. Public health officials often recommend preventive measures such as using insect repellent, wearing long sleeves and pants, and eliminating standing water where mosquitoes breed.

The contractor responsible for mosquito abatement efforts, the specific locations within the county most affected, and any recent public health advisories or initiatives related to this surge were not detailed in the trend summary.

Further information is expected to be released by local health authorities as they monitor the situation. The severity of the increase suggests a heightened risk for residents, underscoring the importance of public awareness regarding mosquito bite prevention and symptom recognition.

The exact number of cases, specific dates, and geographical distribution within the county are points that may be clarified by public health agencies in subsequent reports.

Story summarized from the original created by Google News on news.google.com, see more information here.