Edward Jenner — "The human mind is a wonderful machine; but it is also a very delicate one."

"It is a pity that the practice of inoculation has not been more generally adopted; for if it had, many lives might have been saved."

"The discovery of vaccination is one of the most important that has ever been made."

"I have often found that the best way to learn is to teach."

"I have always endeavoured to be guided by reason, and not by prejudice."

"How wonderful that this horrid pestilence should at this time even have an existence in our island . . . A Physician from Copenhagen call'd on me today, and express'd his astonishment at an opposition…"