West Nile Virus spreads mainly in warmer months, causing mild to severe neurological symptoms in some cases. While most recover with supportive care, severe infections require prompt medical attention. Awareness and mosquito prevention are key to reducing risk.

West Nile Virus transmission is most common from late summer to fall, aligning with increased mosquito activity. Infected individuals often experience symptoms such as fever, fatigue, and headaches, while about 20% have mild effects. Severe cases, including neuroinvasive conditions like encephalitis and meningitis, occur in roughly 1% of cases. The illness can present with varied symptoms, from mild flu-like signs to serious neurological issues, typically developing 2 to 15 days after infection. There is no specific cure; treatment centers on supportive care and preventing complications. The virus is increasingly detected in northern areas, but cases are nationwide.