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According to federal,1 academic,2 and lay3 observers, smallpox might be used as a weapon of terrorism. Variola virus is presumed to be available,4 and a terrorist could introduce it, leading to secondary spread and deaths. Current policy is to promote vaccination, initally to 1/2 million hospital-selected health care providers5 and subsequently to as many as 10 million others.6 This policy should be compared with alternatives in the light of the likely outcome of an introduction of variola virus into this country. Three decades ago, I was among those who investigated the dynamics of smallpox transmission by direct observation in Pakistan. . . .
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Thomas M. Mack (2003) studied this question.
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