Zylexis by Pfizer
How to keep a stressed horse from becoming a sick horse.
ZYLEXIS by Pfizer is an inactivated (killed) Parapox Ovis Virus Immunomodulator
that has demonstrated efficacy and safety in stimulating the horse’s
immune response to aid in the reduction of equine upper respiratory
disease associated with EHV-1 and/or EHV-4 infections.