A comparative sketch of the effects of variolous and vaccine inoculation, being an enumeration of facts not generally known or considered, but which will enable the public to form its own judgment on the probable importance of the Jennerian discovery / [Thomas Pruen].

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A comparative sketch of the effects of variolous and vaccine inoculation, being an enumeration of facts not generally known or considered, but which will enable the public to form its own judgment on the probable importance of the Jennerian discovery / [Thomas Pruen]. Public Domain Mark. Source: Wellcome Collection.