It’s not a coincidence that we see more equine infectious diseases during busy show seasons. Shows are a great way for infectious diseases to spread, with outcomes ranging from disease in single horses to widely disseminated outbreaks, even across international borders.
We can’t eliminate all risk in life, and the risk of infection in horses is no different, but we can do many things to reduce the risk. A lot of these are what I call "low hanging fruit," meaning they are measures that are really quite easy and practical (but often not done regardless).
Friend and colleague Dr. Paul Morley and his team have put together a great 7-minute video entitled "Preventing infections in Horses Attending Shows and Traveling." It provides great information and is well presented, and anyone who travels with horses (or runs a farm that has horses that travel) should take a look.