Publications

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outbreaks of smallpox due to variolation in china, 1962-1965.in 1985, previously unknown outbreaks of smallpox were uncovered which had occurred in shanxi province and nei monggol autonomous region in northern china during 1962-1965, several years after smallpox transmission was thought to have been interrupted. during field investigation, the authors learned that most of the cases were known to local health officials but had not been officially reported to national authorities. all were among persons who had been variolated or were their close contacts. ...19882837897
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