Edward Jenner humans a cowpox vaccine against smallpox. For example, Dorset farmer Benjamin Jesty successfully vaccinated and presumably induced immunity with cowpox in his wife and two children during a smallpox epidemic in 1774, but it was not until Jenner's work that the procedure became widely understood. Jenner may have been aware of Jesty's procedures and success. A similar observation had also been made in France by Jacques Antoine Rabaut-Pommier in 1780. Noting the common observation that milkmaids were generally immune to smallpox, Jenner postulated that the pus in the blisters that milkmaids received from cowpox (a disease similar to smallpox, but
Caitlyn Jenner the pole vault, when Jenner took the lead, and javelin. By that point, victory was virtually assured, but it remained to be seen by how much Jenner would improve the record. In the final event—the 1500 meters, which was seen live on national television—Jenner looked content to finish the long competition. Jenner sprinted the last lap, making up a 50-meter deficit and nearly catching the event favorite, Soviet Leonid Litvinenko, who was already well out of contention for the gold medal, but whose personal best had been eight seconds better than Jenner's personal best before the race. Jenner set a