A countywide full-scale exercise of mass immunization/prophylaxis will take place Wednesday and Thursday this week. The Canadian County Emergency Operations Center at the Courthouse will act as the main command center for the county both for this exercise and if such an event were to take place in real life. Participating in the exercise are Canadian County Emergency Management, Canadian County Health Department, Yukon Integris Hospital, El Reno Mercy Hospital, Yukon Police Department, El Reno Police Department, and Canadian County Commissioner District 2 along with local volunteer groups and other county organizations and businesses.