Vaccinate your horse

Do you have any horses, do they need to be vaccinated or are they like most ranch horses, they get fed and they run free out in the fields until the next time when we need them. There is a web site out their that will help you deside if your horse needs to get vacinated or if they will be find with out it. Can you vaccinate the horse yourself or do you need to take the horse to the veterinarian so he is able to do it. There are many did ideas on vaccinating you horse so lets see what we can find out.