Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
John Walker: child with cow-pox. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.
Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
John Walker: child with cow-pox. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.