From Efficacy to Reactions: What to Expect From Vaccines

Your veterinarian is the best resource when it comes to choosing the right vaccine for your horse.

No account yet? Register


Each spring, owners are encouraged to schedule an equine wellness exam with their veterinarians that often includes annual vaccinations. Vaccinations can be put into two categories: core vaccines, used to protect horses against diseases that every horse is at risk of contracting (such as West Nile virus, Eastern and Western encephalitis, tetanus, and rabies), and risk-based vaccines. The latter are often recommended based on a horse’s geographic location, occupation and traveling status.

One of the most critical health decisions a veterinarian and horse owner can make is choosing the right vaccines. Bob Stenbom, DVM, senior equine professional services veterinarian with Boehringer Ingelheim, explains what should be considered when choosing a vaccine.

“Efficacy is a vaccine’s ability to protect against a certain disease challenge,” says Stenbom. “It can vary, and can be based on the time elapsed since the previous exposure to that vaccine, and how well the initial series of vaccines were given to the horse. It also depends on how intense or prevalent the disease is in the horse’s geographic area, among other things.”

Some horses that compete or perform are required to be vaccinated regularly to minimize outbreaks. Find the U.S. Equestrian vaccine rule online

Create a free account with to view this content. is home to thousands of free articles about horse health care. In order to access some of our exclusive free content, you must be signed into

Start your free account today!

Already have an account?
and continue reading.


Written by:

Related Articles

Stay on top of the most recent Horse Health news with

FREE weekly newsletters from

Sponsored Content

Weekly Poll

sponsored by:

Where do you go to find information on pituitary pars intermedia dysfunction (PPID)? Select all that apply.
91 votes · 158 answers

Readers’ Most Popular

Sign In

Don’t have an account? Register for a FREE account here.

Need to update your account?

You need to be logged in to fill out this form

Create a free account with!