Drawing of Cowpox Infected Arm

Drawing of cowpox infection of milkmaid Sarah Nelmes' arm, as part of Jenner’s experiment into vaccination for smallpox.

An inquiry into the causes and effects of the variolæ vaccinæ : a disease discovered in some of the western counties of England, particularly Gloucestershire, and known by the name of the cow pox, 1798, E.i.06, Pybus (Professor Frederick) Collection.