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Description:This historic photograph shows a technician calibrating an iron lung machine.
These machines were used to keep polio patients alive, enabling them to breathe by creating a negatively-pressurized environment around their bodies after having been sealed inside the machine, with only their head exterior to the confines of the apparatus.

Poliovirus is a member of the enterovirus subgroup, family Picornaviridae. Enteroviruses are transient inhabitants of the gastrointestinal tract, and are stable at acid pH. Picornaviruses are small, ether-insensitive viruses with an RNA genome.

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Content Providers(s):CDC
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Links:CDC – Health Topic: Polio
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.