Zoetis Animal Health West Nile Innovator 1 DoseZoetis Has been shown to provide an immune response to West Nile virus that is four times more than a big one shot combination vaccine. WEST NILE INNOVATOR vaccine was shown to be 96. 7% effective against a 2003 outbreak among immunologically nave horses. The only vaccine credited for helping reduce the number of equine West Nile virus cases by nearly 70% from 2002 to 2003. The only West Nile virus vaccine adjuvanted with MetaStim for improved immune