Bioterrorism-related inhalational anthrax cases by week of symptom onset—United States, 2001.The first two cases of inhalational anthrax occurred in Florida. Though no direct exposure source was found, environmental samples of the media company in which these two patients worked and the postal facilities serving the media company yielded Bacillus anthracis spores specifically implicating a B. anthracis–containing letter or package (4): †, the letters to Senators Thomas Daschle and Patraick Leahy
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