Co-authors of “Dissolving Illusions: Disease, Vaccines, and the Forgotten History”, Dr. Suzanne Humphries and Roman Bystrianyk, talk in depth about the history of disease and vaccination, primarily in relation to smallpox and polio, and how these diseases actually affect afflicted populations. Paralysis has many causes. Do childhood diseases serve a useful purpose? Does vaccination itself cause disease? Herd immunity is explained.