Anti-vaccination : the statistics of the Medical Officers to the Leeds Small-pox Hospital exposed and refuted, in a letter to the Leeds Board of Guardians / by Jno. Pickering.

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Anti-vaccination : the statistics of the Medical Officers to the Leeds Small-pox Hospital exposed and refuted, in a letter to the Leeds Board of Guardians / by Jno. Pickering. Public Domain Mark. Source: Wellcome Collection.