The timing of vaccines is based upon several things including the age of your horse, how often they travel, their contact with other horses and what their immune system is like. At Great Lakes Equine we follow the vaccination protocol put forth by The American Association of Equine Practitioners (AAEP). Typically spring vaccinations begin prior to mosquito season between March and May. Core vaccines at this time would include West Nile Virus (WNV), Eastern and Western Encephalitis Virus (EEV, WEV), Rhino and Influenza Virus, and Tetanus. Optional (but strongly encouraged) would be PHF and Intranasal Strangles vaccines. The fall vaccines are then given between August and October. The core vaccines at this time would be Rabies, Rhino and Influenza Virus, as well as a booster with PHF. Again it is very important to know that vaccination protocols can change from farm to farm and horse to horse based on various factors. It is important to have a discussion with your veterinarian to determine what vaccines are needed for your horse and your specific situation.