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,
Frank Jenner into his home for tea and told him about the gospel. Jenner converted to Christianity and, when he went home, told Jessie that she was a sinner bound for hell and therefore in need of salvation. According to Wilson's biography of Jenner, Jessie thought that Jenner had become manic or insane. They had a young daughter named Ann by this point and Jenner was gambling so much that he was not providing for his family. For both of these reasons, Jessie left Jenner and moved to Corowa to work on a farm, taking Ann with her. She said that she