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
Thomas Jenner bench as a Baron of the Exchequer. With the majority of the judges, Jenner gave judgment in favour of the king's claim to the dispensing power which was raised in the case of Sir Edward Hales. In October 1687 Jenner was appointed one of the three royal commissioners to inquire into the appointment of a president of Magdalen College, Oxford; the other commissioners were Robert Wright and Thomas Cartwright. Jenner's diary of the proceedings survived in the library of Magdalen College. Cartwright sought to have him dismissed from the commission, finding him too moderate if outwardly overbearing to the fellows,