Due to the time lapse between exposure and the onset of symptoms following a bioterrorist attack, such attacks are difficult to determine and control. With the rapid transit network in the U.S., people could be exposed in one area and then return home before developing symptoms, potentially exposing hundreds of other people. The following references provide ways to prepare for responding to a bioterrorist attack, including state and federal disease surveillance and epidemiology, stockpiling vaccine for emergency use, mass vaccination of first responders, and training for medical personnel.