Merck - Prestige 5 + WNV has been shown effective for the vaccination of healthy horses 6 months of age or older against Eastern and Western encephalomyelitis (EEE and WEE) viruses, equine influenza virus (EIV), equine herpesvirus type 1 (EHV-1), equine herpesvirus type 4 (EHV-4), tetanus and West Nile Virus.
For primary vaccination aseptically administer 1 mL intramuscularly, repeat with a single dose in 3 – 4 weeks. Historically, annual revaccination with this product has been recommended.