Indications: For vaccination of healthy horses 4 months of age or older as an aid in the prevention of viremia and mortality, and an aid in the reduction of severity of clinical disease caused by West Nile Virus. The duration of immunity is at least 12 months. Administration and Dosage: Shake well before use. Using aseptic technique, inoculate horses intramuscularly with a 1 mL dose. Administer a second 1 mL dose intramuscularly in 3-4 weeks using a different injection site. Revaccinate annually and prior to anticipated exposure with a single 1 mL intramuscular dose. Precautions: Store at 35 – 45°F 2 – 7°C. Protect from freezing. Do not vaccinate within 21 days before slaughter. Anaphylactoid reactions may occur following use. Antidote: Epinephrine. This product has been tested under laboratory conditions and shown to meet all Federal standards for safety and efficacy in normal, healthy, immunocompetent animals. This level of performance may be affected by conditions such as stress, weather, nutrition, disease, parasitism, other treatments, individual idiosyncrasies, or impaired immunological competency. These factors should be considered by the user when evaluating product performance or freedom from reactions. Preservatives: Gentamicin and Amphotericin B. Boehringer Ingelheim Vetmedica, Inc., St. Joseph, MO 64506 Vetera West Nile Virus Vaccine WNV 1 Dose. I do not receive this product or any others in exchange for this article, I do get a commission for readers clicking the buy now links which helps to differ the cost of hosting this blog and I sincerely hope this article site helps you with your search for Vet Approved Rx products.