For intramuscular vaccination of healthy horses 10 months of age or older as an aid in the prevention of equine encephalomyelitis due to Eastern , Western and Venezuelan viruses, equine rhinopneumonitis due to types 1 nad 4 viruses. Directions: Shake well before using. Vaccinate healthy horses with a 1 ml dose intramuscularly followed by a second 1 ml dose 3 to 4 weeks after the first dose. A 1 ml dose booster should be given annually. Early revaccination may be advisable when horses are faced with an outbreak or with other conditions which might make heavy exposure likely. Preservatives: Thimerosal, neomycin and polymyxin B.