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,
Kendall Jenner two signature nail lacquers for the 2011 Nicole by OPI Kardashian Kolors nail polish line, for which the Jenner sisters eventually earned a combined in endorsement profit. On March 16, 2012, the Jenner sisters were named Creative Directors of the "Gillette Venus Gets Ready with Kendall & Kylie Jenner" webisode series, which was originally aired on Gillette's Facebook page. In July 2013, the Jenner sisters formed a partnership with Pascal Mouawad's Glamhouse to create the "Metal Haven by Kendall & Kylie" jewelry collection. In February 2014, the Jenner sisters launched a shoe and handbag line under Steve Madden's "Madden Girl"