The first vaccine – Smallpox
■ Invented by Edward Jenner in 1796
– Jenner noticed that milkmaids who were exposed to cowpox, a milder disease
similar to smallpox, did not develop smallpox to the same extent as others
– He developed method of arm-to-arm inoculation: a small amount of pus from
one person’s blisters was inoculated into the arm of another