Focus Cat Vax 3 plus FeLV vaccine is designed for administration by subcutaneous injection. This vaccine contains Leukemia, Rhinotracheitis, Calicivirus, and Panleukopenia virus antigens. Each of the viruses are widespread and are common disease-causing agents in cats. Always check with your veterinarian about correct / proper vaccination protocol. | Durvet Focus Cat Vax 3 Way Protection Plus FeLV | Size One Dose