US expands anti-bioterrorist measures.
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D000881:Anthrax / Q000517:prevention & control; D001408:Bacillus anthracis / Q000166:cytology; D001428:Bacterial Vaccines; D001709:Biotechnology / Q000639:trends*; D023482:Bioterrorism / Q000191:economics / Q000331:legislation & jurisprudence* / Q000517:prevention & control*; D006077:Government Agencies; D006801:Humans; D011634:Public Health; D012900:Smallpox Vaccine; D014481:United States
D001428:Bacterial Vaccines; D012900:Smallpox Vaccine