Support WBURDecades after polio, Martha is among the last to still rely on an iron lung to breathePlay08:00Download AudioErin KellyAlissa EscarceOctober 25, 2021 ShareMartha Lillard needed a large respirator called an iron lung to recover from polio, which she caught in 1953. She still uses a form of the device at nights. (Courtesy of Martha Lillard)