Edward Jenner, 1749-1823.
An inquiry into the causes and effects of the variolĉ vaccinĉ, a disease
discovered in some of the western counties of England, particularly
Gloucestershire, and known by the name of the cow pox / By Edward Jenner.
[1st ed.] London, Printed for the author by Sampson Low, and sold by Law
Armorial bookplate of Robert Phillipps of Longworth Co. Hereford, Esquire.
Plagues of smallpox ravaged Europe and the American colonies, and the
disease became the special study of Jenner in 1776. A country
practitioner, he had noticed that milkmaids having cowpox sores on their
hands remained immune from smallpox and that others that had had smallpox
in a milder form became immune to its reappearance. Jenner then developed
a method of taking lymph from one having cowpox and injecting this vaccine
(Latin, vacca, a cow) into one to be immunized. He first so immunized a
boy and then, as detailed in the above tract, treated 22 other patients
with complete success.
(Heralds of Science, 1955, p. 58)