The infected horses or other horses exposed at the quarantined facilities
attended several recent
events, including an Oregon High School
Equestrian Team (OHSET) meet at the Linn County Fairgrounds on April 16 - 19, and rodeo
events at Branton Arena in Jefferson, Oregon, April 19 - 20, as well as at the High Prarie Area in Eugene, Oregon from April 25 - 26.