Emerson was the brother of John Haven Emerson the inventor of the iron lung. By 2014, there were only 10 people left with an iron lung. O'Brien breathed with the support of an iron lung for much of his life. The latter was often treated with an iron lung. Boston manufacturer Warren E. Collins began production of the iron lung that year. The documentary short features Berkeley writer Mark O'Brien, a disabled poet with an iron lung. The Emerson Iron Lung was produced until 1970. She required constant care and was still spending her nights in an iron lung. Both to create an inexpensive "iron lung". It proved a success and soon superseded the iron lung throughout Europe. Angelo continues with the doctor's experiments, bringing young boys to Klaus in his iron lung. Bell also built the forerunner to the iron lung and experimented with breeding sheep. He slept in an iron lung at night and often rested there during the day. The iron lung now has a marginal place in modern respiratory therapy.