• A primary course of two vaccinations between 21 and 92 days apart (3 weeks to 3 months).
• A third vaccination between 150 and 215 days after the second vaccination.
• Further booster vaccinations at intervals of not more than a year apart.
None of the vaccinations must have been given on the day of a race in which the horse is declared to run or on any of the 6 days before the race.
All equine influenza vaccines currently available in the UK are permitted by the BHA.