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."

"Imagination is more powerful than knowledge."

"The world is full of wonders if you know where to look."

"You have the imagination of a child, Lucy"

"The world is full of mysteries waiting to be solved."