Intervet- 3-way Sleeping Sickness,tetanus,Flu, and Rhino. For vaccination of healthy horses against Eastern, Western, and Venezuelan encephalomyelitis, equine influenza types A1,A2 & KY93, tetanus, and rhinopneumonitis EHV-1 & EHV-4. Inject 1ml IM and repeat 3-4 weeks later. revaccinate annually.