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

Yes, Edward Jenner did deliberately infect his son, Robert, with cowpox in an experiment to test his smallpox vaccine. Jenner believed that exposure to cowpox would provide immunity to smallpox, and he used his son as a subject to demonstrate this principle. This experiment was part of Jenner's groundbreaking work in developing the smallpox vaccine in the late 18th century.