3 ms·
That was the case with Smallpox and Cowpox, and the original vaccine.
by toomanybeersies 7y ago
That was the case with Smallpox and Cowpox, and the original vaccine.
- elliekelly 7y agoInteresting! From the smallpox wikipedia page: > The term vaccine derives from the Latin word for cow, reflecting the origins of smallpox vaccination.