A Chester County School Vaccinates Adults After Whooping Cough OutbreakValley Forge Elementary School has had two confirmed cases of pertussis, and that is enough to constitute an "outbreak," according to Betsy Walls, bureau director for personal health services at the Chester County Health Department.

More From CBS Philly

Getaway Guide: Best Of The Jersey Cape Clams
Videos
Fourth Of July Fashion Guide

Watch & Listen LIVE