Here's the rundown:
-Equine influenza is a highly contagious respiratory disease that can be fatal to colts and severely weaken mature horses; transmission to humans has yet to be shown.
-Suspected equine influenza was discovered on October 26; on the 12th of November it was confirmed in Bugan Sum and Uyench Sum in Khovd Province (on the Chinese - Mongolia border)
-About 600 horses have been infected with the disease, which has prompted prevention agencies to quarantine the areas of the outbreak.
For more info on equine influenza: http://www.equiflunet.org.uk/