A treatise on cow-pox : in which the existence of small-pox, or varioloid in any form, subsequent to vaccination, is shown to arise from some imperfection in its performance, and not the result of inefficacy on the part of the vaccina to shield the system entirely from these diseases
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The Medical Heritage Library NLM Medicine in the Americas US National Library of MedicineUploaded by U.S. National Library of Medicine on