In the 1920s, an instrument known as an "iron lung" was developed to fight breathing difficulties associated with which infection?

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In the late 1920s, an instrument known as the "iron lung" was developed and used to fight the breathing difficulties associated with acute flaccid paralysis-poliomyelitis.This tank respirator provided a chamber that encased the patient in an air-tight chamber and created a negative pressure around the patient's thoracic cavity, causing air to rush into the lungs to facilitate breathing.Because of the poliomyelitis epidemics in the 1930s through the 1950s, entire polio wards that housed these "iron lungs" were established in hospitals and used to provide respiration for patients who were the most severely affected.

In the 1920s, an Instrument Known as an "Iron Lung