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D000818:Animals; D023482:Bioterrorism / Q000517:prevention & control; D021821:Communicable Diseases, Emerging / Q000453:epidemiology / Q000517:prevention & control; D004196:Disease Outbreaks / Q000517:prevention & control / Q000706:statistics & numerical data; D034742:Electronic Mail / Q000266:history / Q000592:standards / Q000706:statistics & numerical data*; D004813:Epidemiology / Q000266:history* / Q000639:trends; D049673:History, 20th Century; D006801:Humans; D007391:International Cooperation; D020407:Internet / Q000266:history / Q000706:statistics & numerical data*; D014838:Volunteers