Jenner received his training from famous surgeon John Hunter

After attending grammar school, he was hired as an apprentice by a neighborhood surgeon when he was 13 years old. He went to grammar school and began working as a surgical apprentice when he was 13 years old. In the eight years that followed, Jenner thoroughly studied the field of medicine and surgery. Jenner started working as an apprentice for nearby surgeon Daniel Ludlow in 1763. During his seven years of training with Ludlow, he gained valuable expertise that helped him later in his profession.

Then he attended St. George's Hospital in London, where he had an anatomy and surgery apprenticeship with John Hunter, one of the most recognized surgeons of the day. What's more, he was a world-class anatomist, biologist, and experimentalist who not only collected biological specimens but also focused on issues related to physiology and function. The two men's strong friendship persisted until Hunter died in 1793. The stimulus that so validated Jenner's innate tendencies - a catholic curiosity in biological phenomena, focused observational skills, honed critical faculties, and reliance on experimental research—could have come from no one else. Hunter gave Jenner the recognizable advice, "Why to think [i.e., speculate] - why not undertake the experiment," to Jenner. From the University of St. Andrews, he received his MD degree. When his studies were over in 1773, Jenner returned to his native Gloucestershire to start a successful career as a surgeon and family doctor.