West Nile virus cases rising nationwide amid mosquito season.

The article focuses on the rising cases of West Nile virus across the U.S. during mosquito season. Several states have reported new cases, and health officials are urging people to take preventive measures such as using insect repellent and wearing protective clothing to avoid mosquito bites. The virus, transmitted by infected mosquitoes, can lead to severe neuroinvasive disease and has no specific treatment for humans.