In 2026, the West Nile virus is making an unusually early appearance, with infected mosquito populations identified in Texas, Louisiana, and various counties in California ahead of the summer peak. Health authorities indicate that the warmer and wetter conditions brought by El Niño are facilitating the spread of disease-carrying Culex mosquitoes into new regions of the United States. While about 80% of those infected remain asymptomatic, approximately 1% may experience severe neurological complications, particularly in adults aged 60 and older, as well as those with weakened immune systems. The CDC advises Americans to eliminate stagnant water and apply insect repellent as the risk of summer transmission rises.
