THE 1976 LEGIONNAIRES' DISEASE OUTBREAK

Episode 205 | Historical Events

In this History episode we focus on the 1976 Legionnaires' Disease outbreak — the most publicized disease investigation in CDC history at the time, and the discovery of a bacterium entirely unknown to science. During the American Legion's annual convention at Philadelphia's Bellevue-Stratford Hotel in July 1976, an unknown disease began killing veterans. Thirty-four died. More than 200 were sickened. Six months of investigation produced no answer — until a CDC researcher working a long-shot hypothesis found Legionella pneumophila growing in the hotel's cooling tower.

We examine the investigative dead ends, the public panic, the simultaneous release of The China Syndrome twelve days before Three Mile Island, and why the disease had been killing people in earlier outbreaks without anyone knowing what it was. The 2018 CDC data showing Legionnaires' cases at 14 times the 1980 rate — driven by inadequately maintained water systems in hospitals, hotels, and long-term care facilities — closes the episode with a question about how well we've applied what 1976 taught us.

This podcast features narration with a synthetic AI voice.

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