Edward Jenner full-blown infection. Later, he injected Phipps with variolous material, the routine method of immunization at that time. No disease followed. The boy was later challenged with variolous material and again showed no sign of infection. Donald Hopkins has written, "Jenner's unique contribution was not that he inoculated a few persons with cowpox, but that he then proved [by subsequent challenges] that they were immune to smallpox. Moreover, he demonstrated that the protective cowpox pus could be effectively inoculated from person to person, not just directly from cattle. Jenner successfully tested his hypothesis on 23 additional subjects. Jenner continued his research
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