In 1796, English physician Edward Jenner conducted his first clinical trials in vaccination against smallpox, deriving his vaccine from the milder cowpox virus. Once the vaccine had been tested, Jenner vaccinated his patients, set up a free clinic to vaccinate poor people and provided other doctors with the vaccine so they could do the same. (An anti-vaccine movement came about soon after.) He even coined the word "vaccination" from "vacca," the Latin word for cow.
Lactose, which is found in milk, would be best classified as what?
Previous answer: Signed on June 28, 1919, the Treaty of Versailles led to the end of World War I.
TRIVIA FANS: Leslie Elman is the author of "Weird But True: 200 Astounding, Outrageous and Totally Off the Wall Facts." Contact her at [email protected]