@PamCan : The purpose of the exercise is to train volunteers - for PODs specifically most volunteers are doctors and nurses - fully accredited - and then basic volunteers for things such as traffic control, setup/take down/administrative/etc.
The POD is Point of Distribution - in the even of something such as bioterrorism, or mass outbreak of a virus or bacteria - a POD would be the distribution point for any innoculants to be destributed to the general public. It is a proven fact that the drive through PODs work best in these situations.
For volunteer POD training they usually distribute skittles or M&M's or some such. Or at least they used to.
A basic chain of events: A mass prophalaxis need is declared and public notice is given via TV/Radio/Phone/Etc with the POD location. You get in your car and drive the the POD site. You remain in your car and drive through everything, never having to leave your car. Station 1: Someone greets you at the site and directs you to a line of cars. Station 2: Someone else comes to your car window and gets basic info needed for the particular instance - probably names and ages of all persons in car. Station 3: You may have to sign something saying you've been there. Station 4: You verify name and age of each in car and receive one prophylaxis per person in vehicle. Station 5: You throw away your pill cup. And you drive home!
I was certified to work as a volunteer in a POD for the County & City several years ago. Pretty intensive training.