Polio: Then and now – Pam and Patricia O'Neil (now Patricia O'Neil Dryer) were poster children for a campaign to stop polio in the 1950s.
Polio: Then and now – Polio patients who could not breathe on their own were put into this respirator device, called an "iron lung." This image is from 1960.
Polio: Then and now – An infant receives an oral polio vaccine at the Well-Baby Clinic in Dekalb County, Georgia, in 1977.
Polio: Then and now – Afghan Health Ministry employees administer polio vaccine drops to a child in Laghman province on June 11, 2012.
Polio: Then and now – A three-month-old infant receives polio vaccination drops from his mother at a camp in Jalozai, Pakistan, in this picture taken July 13.