To ensure the safety of school-aged children and adolescents, school counselors must not ignore or deny the public health threat of bioterrorism (Henderson, 1998). Rather, school counselors must be prepared with knowledge about bioterrorism and intervention skills. Bioterrorism within the United States is a continuing threat. Because children and adolescents are among the most vulnerable populations during a bioterrorist attack, school counselors must be prepared with knowledge and skills. This article provides pertinent information including (a) a description of bioterrorism and biological agents, (b) the psychological impact of bioterrorism, (c) school counselors' role in a school-related incident, and (d) disaster mental health principles and procedures. Implications for school counselors are discussed in the context of the ASCA National Model[R]. A description of biological agents can be found at the CDC Web site, listed in the Appendix of this article.