Horse Equine Influenza Vaccination and Outbreak Control

Equine influenza remains a significant respiratory disease threat. Vaccination, biosecurity and outbreak response protocols protect horse health and welfare.

Key Facts

Equine influenza spreads rapidly through droplet transmission between horses
A major UK outbreak in 2019 affected over 180 horses including vaccinated animals
The FEI and British Horseracing Authority mandate vaccination intervals for competition horses
Vaccines require primary course and boosters every 6-12 months depending on strain
Influenza-affected horses suffer fever, nasal discharge, coughing and prolonged lethargy

Welfare Considerations

Equine influenza causes acute respiratory disease that requires weeks of rest and recovery. Horses pushed back into work before full resolution risk developing secondary bacterial pneumonia and chronic respiratory complications. Outbreaks at livery yards and competition venues cause welfare impacts at scale — multiple horses simultaneously ill with no treatment other than supportive care. Regular vaccination and avoiding vaccine gap through consistent scheduling is the most effective welfare protection. Biosecurity including isolation of new arrivals reduces introduction risk at premises level.

What You Can Do

Keep equine influenza vaccinations current within the required intervals for your discipline
Isolate any new or returning horses for 2-3 weeks before mixing with the resident herd
Report suspected influenza outbreaks to the HBLB Equine Disease Surveillance system
Notify competition organisers if horses develop respiratory signs after competition
Provide appropriate rest and supportive care — avoid return to work until fully recovered