In many ministries of health, applied epidemiology and training programs (AETPs) are responsible for detecting and responding to acute health events, including bioterrorism. In November 2001, we assessed the bioterrorism response capacity of 29 AETPs; 17 (59%) responded. Fifteen countries (88%) had bioterrorism response plans; in 6 (40%), AETPs took the lead in preparation and in 6 (40%) they assisted. Between September 11 and November 29, 2001, 12 AETPs (71%) responded to a total of 3024 bioterrorism-related phone calls. Six programs (35%) responded to suspected bioterrorism events. AETPs play an important role in bioterrorism surveillance and response. Support for this global network by various health agencies is beneficial for all developed and developing countries.