Jenner, Edward (1749-1823), an English physician of Gloucestershire. Young Jenner went to London and studied medicine with the celebrated anatomist, John Hunter, in whose family he lived for two years. On returning to his native Berkeley he gave his attention to the plague of smallpox permanently prevalent in all parts of the country. Starting with the hint given by the dairymen that those who had acquired cowpox by milking cows were not subject to smallpox, Dr. Jenner investigated the matter and formulated a regular plan of giving cowpox as a vaccination for the more dangerous pox. He had the courage even to vaccinate his own child. In 1798 he published his method of vaccination. His method was adopted for the British Army.