For vaccination of healthy horses as an aid in the prevention of equine rhinopneumonitis due to types 1 and 4 viruses, and equine influenza due to types A1 and A2 viruses.
Horses, inject one 1 mL dose intramuscularly. Administer a second 1 mL dose 3 to 4 weeks later. A 1 mL booster dose should be given annually.