Characteristics
Equine influenza is characterized by a very high rate of transmission among horses, and has a relatively short incubation time of one to five days.
Horses with horse flu can run a fever, have a dry, hacking cough, have a runny nose, and become depressed and reluctant to eat or drink for several days, but they usually recover in two to three weeks.
An 1872 report on equine influenza describes the disease as:
"An epizootic specific fever of a very debilitating type, with inflammation of the respiratory mucous membrane, and less frequently of other organs, having an average duration of ten to fifteen days, and not conferring immunity from a second attack in subsequent epizootics."
— James Law, Report of the Commissioner of Agriculture for the year 1872
Read more about this topic: Equine Influenza