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
Jenner, California build a house in what became known as Jenner Gulch, the site of the town. Stillwater Cove Regional Park, located north of Jenner, features picnic facilities, beach access, and a historic one-room schoolhouse. Jenner received media attention in 2004 after the bodies of Lindsay Cutshall and Jason S. Allen were discovered on Fish Head Beach just north of town. The incident became known as the Jenner, California double-murder of 2004. According to the United States Census Bureau, the CDP covers an area of 2.4 square miles (6.2 km²), 2.1 square miles (5.5 km²) of it land, and 0.3 square miles