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Researcher Who Led Fight to Eradicate Smallpox Dies at 87

The American epidemiologist who led the World Health Organization's vaccination effort that in 1977 wiped out smallpox, one of the world's most feared contagious diseases, has died. Dr. Donald "D.A.'' Henderson was 87 when he died Friday at a hospice care facility in Towson, Maryland, from complications following a hip fracture, Johns Hopkins University said in a statement. Henderson was a former dean of the school's Bloomberg School of Public...

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