Merck Animal Health 108144 Prestige WNV Vaccine, 1 mL

This product has been shown to be effective for the vaccination of healthy horses six months of age or older against West Nile Virus. Duration of immunity has not been established. For more information regarding safety and efficacy data, go to productdata.aphis.usda.gov. This product has been shown to be effective against encephalitis and viremia caused by west nile virus.