Columbia subject headings:
Bioterrorism--United States--Prevention.
Disaster medicine--United States.
Emergency medicine--United States.
Vaccines--Research--United States.
Harvard subject headings:
Bioterrorism--United States--Prevention
Disaster medicine--United States.
Emergency medicine--United States.
Vaccines--Research--United States.
Princeton subject headings:
Bioterrorism--United States--Prevention.
Disaster medicine--United States.
Emergency medicine--United States.
Vaccines--Research--United States.