Elizabeth "Betsy" Walls '82, RN, the retired director of personal health for the Chester County Health Department, helped to establish the Public Health Emergency Preparedness (PHEP) Program and Medical Reserve Corps (MRC) in Chester County. Walls was honored by the Centers for Disease Control (CDC) as Pennsylvania's PHEP Trailblazer, in celebration of the anniversary of the creation of the program as well as Walls' decades-long service to public health.

Walls holds degrees in nursing and administration from Widener University.