1. 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 Author(s): Hibbard, David R. Publication: New-York : Printed by Harper & Bros., 1835 Subject(s): CowpoxSmallpox -- prevention & controlSmallpox Vaccine
