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
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