Did edward Jenner infect his son with smallpox and if he did which infect?

No, Edward Jenner did not infect his son with smallpox, but rather with cowpox. Jenner's son, Robert, was inoculated with cowpox material on May 14, 1796, and then exposed to smallpox on July 1. Robert did not develop smallpox, demonstrating the protective effect of cowpox vaccination against the disease. This experiment was a key moment in the development of the smallpox vaccine and vaccination in general.