Did you know that, 37 years ago, the World Health Organisation annouced the complete eradication of smallpox? Smallpox was an infectious disease causing severe rashes and eventually evolved to a bunch of blisters all over the body. It could cause death in serious cases, and for a long time it has been the cause of 1/3 of blindness case in Europe. Mass vaccination we done in the 19th and 20th century to eventually manage to get completely rid of this terrible disease. History, needs never be forgotten!