Delivering death in the mail.
Knight
J
J
D000881:Anthrax / Q000209:etiology* / Q000635:transmission; D023482:Bioterrorism; D002959:Civil Defense; D006801:Humans; D011177:Postal Service; D012106:Research / Q000331:legislation & jurisprudence; D012637:Security Measures; D012899:Smallpox / Q000517:prevention & control; D012900:Smallpox Vaccine; D014481:United States
D012900:Smallpox Vaccine