Description
Chapter 4: "A Continuation of Facts and Observations Relative to the Various Vaccines, or Cow-Pox, 1800"
2010-02-0541:02
Chapter 3: "Further Observations on the Variola Vaccinae, or Cow-Pox, 1799"
2010-02-0501:22:40
Chapter 2: "An Inquiry into the Causes and Effects of the Variole Vaccine, or Cow-Pox, 1798"
2010-02-0501:02:16
Chapter 1: "Introductory Note"
2010-02-0503:50
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