Discover the groundbreaking work of Edward Jenner, the English physician and scientist who pioneered the concept of vaccines and created the smallpox vaccine, in this collection of 23 case studies and illustrations. Jenner's work is said to have saved more lives than any other man, with smallpox killing up to 20% of populations in some towns and cities. Known as the father of immunology, Jenner's legacy includes the discovery of the protective effect of cowpox against smallpox, and his appointment as physician to King George IV.