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
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,