This presentation introduces and explores the psychosocial effects of bioterrorism.  As can be imagined, the impact will be both widespread and complex.  Much of the psychosocial impact will be based on risk perception which is influenced by risk communication by leaders and information and reporting by the news media.  Terminology used to describe psychological effects is critical because it can also affect risk perception.  Outbreaks of contagious disease, whether bioterrorist induced or natural, have an additional fear-inducing effect.  This discussion explores the different effects in different populations-community, health care workers, and patients and their families.