Vaccines have become a subject of great controversy in recent months but the requirement to have them is far from new. Almost since the earliest examples of inoculation and vaccination, they have been a requirement for different parts of society. Dan is joined by Dr Lindsay Chervinsky, a historian of Early America, the presidency, and the government to explore how vaccinations have been used throughout the history of the United States. From George Washington inoculating the Continental Army during the American Revolutionary War, through the 1905 Supreme Court ruling mandating vaccines in the interest of public health and right up to the controversies of the modern-day.