Observations on the cow pox : the causes of failure of vaccination, and the modes of prevention / by Joseph Timewell.

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Observations on the cow pox : the causes of failure of vaccination, and the modes of prevention / by Joseph Timewell. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.