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Unexplained History

Unexplained History

Operation Sea-Spray: The Navy Ship That Sprayed a City With Bacteria

Unexplained History · Sep 24, 2026 · 58:43

0:0058:43

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In September nineteen fifty, the United States military carried out six simulated biological attacks on the San Francisco Bay Area. A Navy vessel released Serratia marcescens and Bacillus globigii from offshore while military teams measured how the living aerosol moved through the city.

Days later, Stanford Hospital recorded an extraordinary cluster of Serratia infections. One patient, Edward Nevin, died. This episode reconstructs the operation, the secret report, the hospital outbreak, the congressional reckoning and the Nevin family's lawsuit. It also asks the question that secrecy made almost impossible to answer: did the test cause the death that followed it?

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🎧 Unexplained History explores the myths, mysteries, and misunderstood moments that shaped our world. Hosted by Tom Mackenzie and Don Masterson. New episodes every week.
Follow us on Spotify, Apple Podcasts, or wherever you listen — and uncover the stories history tried to forget.

More at The Unexplained Company

History, Mystery, True Crime, Conspiracy, Paranormal, CIA, Cold War, Ancient Aliens, Archaeology, Unsolved, Supernatural, Tom McKenzie, Audio Drama, Storytelling, Documentaries.

This episode includes AI-generated content.

Episodes: Unexplained History

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