WSmallpox vaccineW1721 Boston smallpox outbreakW2003 United States smallpox vaccination campaignWBifurcated needleWCowpoxWEradication of infectious diseasesWJoseph Omer Joly de FleuryWEdward JennerWLady Mary Wortley MontaguWMaria Isabel Wittenhall van ZellerWBenjamin Waterhouse
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