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,
Robert Francis Jenner Robert Francis Jenner Robert Francis Jenner (13 January 1802 – 8 April 1860) of Wenvoe Castle was High Sheriff of Glamorgan in 1828. The name "Jenner" is said to be the same as Genor or Genore. The Jenners of Wenvoe traced their ancestry back to Thomas Jenner of Northam, Sussex, who died about 1640. His grandson was Sir Thomas Jenner of Petersham, Surrey (1638–1707), a barrister and member of parliament for Rye in 1685. Thomas Jenner's grandson was Charles Jenner (1707–1770), Archdeacon of Huntingdon, Rector of Buckworth and Chaplain in Ordinary to King George II of Great Britain. Charles Jenner's