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
Kendall Jenner line for Nordstrom. The Jenner sisters previewed "The Kendall & Kylie Collection" with PacSun on November 15, 2012; the collection launched in February 2013. On February 3, 2015, the Jenner sisters confirmed "Kendall + Kylie" collaboration with Topshop, which they unveiled in November 2015 at the Chadstone Shopping Centre in Melbourne, Australia. The collection launched in New York on February 8, 2016. On April 27, 2016, the Jenner sisters previewed a summer swimwear collection. Beginning 2015, Jenner featured in a series of commercial ads for various products including Jenner's signature Pure Color Envy Matte Sculpting Lipstick. Jenner has also promoted