Equine West Nile Virus is becoming an epidemic in the Treasure Valley. Most horses that are infected will clear the virus with little or no symptoms. Close to 50% horses that develop acute West Nile Virus symptoms will die. There is a Vaccine for horses. The Vaccine can be applied by the horse owner or a veterinarian. The vaccine is a shot that must be given twice 30 days apart. A yearly booster then must be given every year. This vaccine is available at all Zamzows.