Monday's drive thru flu shot clinic in Brewster will also serve as a Point of Dispensing drill.  The Putnam County Department of Health says it will be a simulated test of Putnam’s local emergency response system with the ability to dispense medication smoothly and efficiently.  The New York State Department of Health requires local health departments to perform yearly drills to maintain their preparedness capabilities. Many metrics are monitored to assure the drill meets necessary objectives, including the “through-put” number, or how many residents receive their vaccine in a specified period of time. Utilizing an online pre-registration system was a necessary component of this state-mandated exercise.