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
Brody Jenner Khloé, and Rob; and his half-sisters, Kendall and Kylie Jenner. Jenner was born in Los Angeles, California, on August 21, 1983, to reality television personality and retired Olympics champion Caitlyn Jenner (formerly Bruce Jenner) and actress Linda Thompson. He is the half-brother to Burton "Burt" and Cassandra "Casey" Jenner through Caitlyn's marriage to Chrystie Crownover, which lasted from 1972 until 1981. Jenner is the younger brother of Brandon Jenner, also a reality-television personality. After Jenner's parents divorced in 1985, Caitlyn Jenner married Kris Kardashian, the ex-wife of attorney Robert Kardashian, in 1991. Consequently, Jenner became a stepbrother of Kourtney, Kim,