An outbreak of Equine influenza (EI) in early 2019 almost brought the Irish equine industry to a halt. A year on, it is a timely reminder to consider this virus, the effects it can have as well as the critical aspects surrounding control, in particular, the appropriate use of vaccination.

EI is a highly contagious virus and is rapidly transmitted from horse to horse and by indirect contact, via feed buckets, tack and human clothes. EI can have serious implications for your horse’s health, including a high temperature, nasal discharge and a harsh cough. Recovery can mean long periods of rest and secondary complications can be costly to treat.

Vaccination is the best way to protect your horse and others around it from the negative effects of EI. Vaccination is an effective and safe means of protecting your horse, and, compared to treatment, is inexpensive.

Despite the benefits of vaccination, estimates suggest that only 41% of the total equine population in Ireland is vaccinated. Consequently, almost two thirds of horses are unprotected. This would have been a significant contributing factor in last year’s outbreak. Unvaccinated horses pose a serious risk to the vaccinated population as they become ill and spread the virus. This challenges the immunity in vaccinated horses putting it under added pressure.

Vaccination generally provides protection for up to 12 months after the initial course so regular vaccination is necessary to ensure your horse remains protected. Boosters for EI should be given annually. Be aware that some national and international associations require vaccination every six months to participate in competitions. Check the rules locally and make sure you are up-to-date with your vaccinations. Vaccination boosters also offer the ideal opportunity for you to ask your vet to give your horse a general health check.