Cowpox: areas of affected skin on the face and thumb of a patient, showing the development of the disease (possibly after vaccination?). Colour lithograph, ca. 1880.

Licence: Public Domain Mark

Credit: Cowpox: areas of affected skin on the face and thumb of a patient, showing the development of the disease (possibly after vaccination?). Colour lithograph, ca. 1880. Wellcome Collection. Source: Wellcome Collection.