Historical sketch of the opinions entertained by medical men respecting the varieties and the secondary occurrence of small pox; With observations on the nature and extent of the security afforded by vaccination against attacks of that disease: in a letter to Sir James McGrigor, director-general of the army medical department, &c. By John Thomson, M.D. F.R.S.E.
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Inscription: For A. Colles Esq. from the Author