Inject one 1 mL dose intramuscularly using aseptic technique.
Administer a second 1 mL dose 3 to 4 weeks after the first dose.
A 1 mL booster dose 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.
PRECAUTIONS: Store in the dark at 2° to 7°C (35° to 45°F). AVOID FREEZING. SHAKE WELL. Use entire contents when first opened. In some instances, transient local reactions may occur at the injection site. Do not vaccinate within 21 days before slaughter. In case of anaphylactoid reaction, administer epinephrine.