Vaccination to Control Equine Influenza During an Outbreak

Equine influenza vaccination strategies evaluated in one study reduced new flu infections on average by 60%.
Please login

No account yet? Register


While vaccination to control equine influenza (EI) in endemic areas is common practice, little is known about the use of early vaccination to eradicate the disease during an outbreak. Researchers recently examined the effect of early vaccination during an outbreak, using the 2007 EI outbreak in Australia, which had previously been free of EI, as a model.

"The Australian EI outbreak was associated with very high rates of spread in the early stages. This was a function of both an entirely naïve population, and movements and mixing of horses associated with a number of weekend recreational events prior to EI being recognized. These events were undoubtedly a key feature contributing to the size and extent of the outbreak," noted Graeme Garner, DVM, director of the animal health epidemiology program at the Department of Agriculture, Fisheries, and Forestry in Canberra, Australia.

Government agencies and the horse community implemented controls to contain the outbreak, including biosecurity measures, restricted movement, and vaccination. Approximately 140,000 horses in affected areas were vaccinated, beginning in the second month of the epidemic, as part of the nationally-coordinated EI control program.

Researchers in Australia employed a premises-level model using the epidemiological data from the 2007 EI outbreak to ascertain the role vaccination played in disease eradication and whether earlier vaccination would have made a significant impact on the epidemic

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:

Freelance journalist Natalie DeFee Mendik is a multiple American Horse Publications editorial and graphics awards winner specializing in equestrian media. She holds an MA in English from Colorado State University and an International Federation of Journalists’ International press card, and is a member of the International Alliance of Equestrian Journalists. With over three decades of horse experience, Natalie’s main equine interests are dressage and vaulting. Having lived and ridden in England, Switzerland, and various parts of the United States, Natalie currently resides in Colorado with her husband and two girls.

Related Articles

Stay on top of the most recent Horse Health news with

FREE weekly newsletters from

Sponsored Content

Weekly Poll

sponsored by:

How do you prevent gastric ulcers in horses? Please check all that apply.
160 votes · 374 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!