jan 1, 1796 - A Vaccine For Smallpox Was Made
Description:
Who: Edward JennerWhat: He found out that people who had cowpox were immune to smallpox, so he tests his theory and tests it on a little boy who afters becomes immune to smallpox.
Why: Without this vaccine, many people would have died from it and our population would be very low.
Added to timeline:
Date:
jan 1, 1796
Now
~ 230 years ago