Equine influenza is a highly contagious viral infection that affects horses. It is caused by the equine influenza virus, which primarily spreads through respiratory droplets when infected horses cough or sneeze. Symptoms include fever, coughing, nasal discharge, and a decrease in appetite. Vaccination is an effective way to prevent equine influenza, and many horse owners ensure their animals are up to date with their vaccination schedules. Outbreaks can occur in stables or during events where horses are in close contact, making awareness and prevention crucial for horse health.