As mosquitoes become more active during the summer, California health officials have issued a warning:The West Nile Virus outbreak in 2026 is intensifying, with two deaths confirmed statewide so far.
The first fatality occurred inKings County… The deceased, a resident of Lemoore, was the first person in California to die from the West Nile virus this year. Subsequently, **Glenn County** also confirmed the death of a resident due to West Nile virus, marking the first such death in the county’s history and the second in California this year.
The virus has spread to several counties.
According to statistics from the California Department of Public Health, as of now, human cases have been reported in several counties across the state, including:
- Los Angeles County
- Sacramento County
- San Diego County
- Santa Clara County
- Kings County
- Fresno County
- Tulare County
- Madera County
- Butte County, etc.
Meanwhile, surveillance teams have detected a large number of virus-carrying mosquitoes, dead birds, and other animal samples throughout the state, indicating that the virus is continuing to spread.
Most people are asymptomatic, but severe cases can be life-threatening.
The West Nile virus is primarily transmitted throughA bite from an infected mosquitoDissemination.
Health experts say:
- About 80% of those infected show no symptoms;
- **About 20%** will experience flu-like symptoms such as fever, headache, muscle aches, nausea, and rash;
- **Less than 1%** may develop serious neurological conditions such as encephalitis or meningitis, which can even lead to death.
Among them, the following groups are at the highest risk:
- Seniors aged 60 and older;
- People with compromised immune systems;
- People with chronic conditions such as diabetes and cancer.
Los Angeles residents mustn’t let their guard down either
Experts point out that, due to a relatively warm winter and persistent high temperatures in California this year, mosquitoes are breeding at a faster rate, resulting in a higher risk of infection than in previous years.
Mosquitoes carrying the West Nile virus have now been detected in Los Angeles County. Residents should remain vigilant and minimize their time outdoors, especially during dusk and dawn, when mosquitoes are most active.
How can it be prevented?
Health authorities recommend that residents take the following measures:
- Use products containing DEET, Picaridin mosquito repellents containing active ingredients such as;
- At dusk and dawn, try to wear long sleeves and long pants;
- Remove standing water from your yard and prevent flower pots, buckets, old tires, and other items from becoming breeding grounds for mosquitoes;
- If you discover a large number of dead birds or unusual mosquito activity, you can report it to your local vector control agency.
ANN News Reminder: Every year, from July through October, is the peak season for West Nile virus transmission. Although most people who are infected do not develop severe symptoms, older adults and those with weakened immune systems face a significantly higher risk of developing severe illness if they become infected. Residents of Southern California should take precautions against mosquitoes when going camping, hiking, or taking evening walks to reduce their risk of infection.
