La Crosse encephalitis is a viral infection caused by the La Crosse virus, which is primarily transmitted through the bite of infected mosquitoes. This disease is most commonly found in the United States, particularly in the Midwest and Southeast regions. Symptoms can range from mild flu-like signs to severe neurological issues, including confusion and seizures. Most cases of La Crosse encephalitis occur in children, but anyone can be affected. There is no specific treatment for the infection, and prevention focuses on avoiding mosquito bites through the use of repellents and protective clothing.