The county health department will be partnering with other agencies to run the drill on Saturday. It will be happening at Kilmer Middle School in Vienna and at other locations around the county.
The exercise builds on lessons learned in 2009, during mass vaccination clinics for the H1N1 flu virus. Saturday's drill will test the county's ability to run multiple response sites simultaneously during an outbreak or bioterror attack when it might become necessary to dispense vaccine or antibiotics to a large segment of the population.
A grant from the federal Centers for Disease Control and Prevention is paying for the exercise.