Quote by Edward Jenner
"In the course of my investigation, I have discovered that the cow-pox is a mild disease, and the human subject can be secured against small-pox by its inoculation."
More from Edward Jenner
"Vaccination is the medical discovery which has saved more lives than any other single medical intervention in the history of medicine."
"The deviation of man from the state in which he was originally placed by nature seems to have proved to him a prolific source of diseases."
"I hope that some transmissible disease of a milder nature will spread through the population and prepare them for the true thing when it comes."
"Truly the cow-pox secures the constitution from that dreadful scourge the small-pox."