Quote by 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."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."