What is the iron lung and how does it work? | BBC News
Kansas City polio survivor is one of last iron lung users in U.S.
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Machine keeps lungs alive outside body
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Living inside a canister: Dallas polio survivor is one of few people left in U.S. using iron lung
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History of Polio - Part I: Suffering the disease
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The inspiring journey of Paul Alexander, the Texas man who lived in an iron lung for over 70 years
