West Nile Virus: Transmission, Symptoms, and Prevention

West Nile virus is not spread person-to-person. Most infected people are asymptomatic. Symptomatic cases are usually mild: fever, headache, body aches, fatigue. Rarely, severe illness or death occurs.

Transmission

  • Infected birds → mosquitoes → humans.
  • Blood transfusions and organ transplants.

Prevention focuses on mosquito bite avoidance.

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