Cowpox children. In 1796, British medical practitioner Edward Jenner tested the theory that cowpox could protect someone from being infected by smallpox. Although cowpox originates on the udder of cows, Jenner took his sample from a milkmaid, Sarah Nelmes. Jenner extracted the pus of one of the lesions formed by cowpox on Nelmes to another individual who never had smallpox, James Phipps. He eventually developed a scab and fever that was manageable. Approximately six weeks later, Jenner then introduced an active sample of the smallpox virus into Phipps to test the theory. After being observed for an extended amount of time,
Caitlyn Jenner a six-minute film featuring Jenner, called "Caitlyn Jenner's Greatest Victories: A Timeline". In a "20/20" interview with Diane Sawyer in April 2015, Jenner came out as a trans woman, saying that she had dealt with gender dysphoria since her youth and that, "for all intents and purposes, I'm a woman." Jenner cross-dressed for many years and took hormone replacement therapy but stopped after her romance with Kris Kardashian became more serious, leading to marriage in 1992. Jenner recounts having permission to explore her gender identity on her own travels but not when they were coupled, and that not knowing the