Vaccination against equine influenza.
D000818:Animals; D005060:Europe; D006734:Horse Diseases / Q000453:epidemiology / Q000517:prevention & control*; D006736:Horses; D009976:Orthomyxoviridae Infections / Q000276:immunology / Q000517:prevention & control / Q000662:veterinary*; D014611:Vaccination / Q000662:veterinary*