The intentional release of biological agents by belligerents or terrorists
is a possibility that has recently attracted increased attention. Law enfor
cement agencies, military planners, public hearth officials, and clinicians
are gaining an increasing awareness of this potential threat. From a milit
ary perspective, an important component of the protective pre-exposure arma
mentarium against this threat is immunization. In addition, certain vaccine
s are an accepted component of postexposure prophylaxis against potential b
ioterrorist threat agents. These vaccines might, therefore, be used to resp
ond to a terrorist attack against civilians. We review the development of v
accines against 10 of the most credible biological threats.