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 Culver's, Stanton's, and Wilkes' stories again, and met yet another person who had become a Christian after an encounter with Jenner. Finally arriving in Sydney, Dixon asked Alec Gilchrist of Campaigners for Christ if he knew a man who asked strangers on George Street whether or not they were headed for heaven or hell. Gilchrist was familiar with Jenner and informed Dixon about how to contact Jenner. Dixon visited Jenner at his house and told him about all the people he had met who had become Christians because of Jenner's evangelism. Jenner, now fifty years old, had never before heard