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Iron lung (c. 1933) used to "breathe" for polio patients until 1955 when polio vaccine became available is located in the Mobile Medical Museum, Mobile, Alabama - original digital file | Library of Congress
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First U.S. Polio Case in Nearly a Decade Highlights the Importance of Vaccination - Scientific American
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My experience with the iron lung, the negative pressure ventilators of the past | British Columbia Medical Journal
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