Edward Jenner more lives than the work of any other human". In Jenner’s time, smallpox killed around 10 percent of the population, with the number as high as 20 percent in towns and cities where infection spread more easily. In 1821 he was appointed physician extraordinary to King George IV, and was also made mayor of Berkeley and justice of the peace. A member of the Royal Society, in the field of zoology he was the first person to describe the brood parasitism of the cuckoo. In 2002, Jenner was named in the BBC's list of the "100 Greatest Britons". Edward Anthony
Edward Jenner their return home. Napoleon remarked he could not "refuse anything to one of the greatest benefactors of mankind." Jenner's continuing work on vaccination prevented him from continuing his ordinary medical practice. He was supported by his colleagues and the King in petitioning Parliament, and was granted £10,000 in 1802 for his work on vaccination. In 1807, he was granted another £20,000 after the Royal College of Physicians confirmed the widespread efficacy of vaccination. Jenner was also elected a foreign honorary member of the American Academy of Arts and Sciences in 1802, and a foreign member of the Royal Swedish Academy