Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
A detail of experiments confirming the power of cow pox to protect the constitution from a subsequent attack of small pox, by proving the identity of the two diseases / by John Badcock. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.