I remember as a youth in the early 50's having a mother that was eager to sign the permission slip to be vaccinated against polio. One of the "dread diseases" common at the time polio was almost as expected to be infecting people as a cold. I remember receiving, and still have, a small tin button reading "polio pioneer". The various governments of the day in Canada were eager to promote the polio vaccine that had little risk of side effects. I remember the devastating effects on some of my friends that did not receive the vaccination (anti-vaxers were around). There are only a few locations in the world where polio exists,polio could easily have been eradicated long go had these locations not been rife with political corruption, civil war or ignorance inspired by religion.