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Cautionary Tales with Tim Harford

Lab Leak: Could Smallpox Come Back?

38 min • 9 maj 2025

In 1978 the world is on the brink of declaring victory over smallpox. No cases have been seen for months, and it looks like the end for a deadly, painful disease. When a photographer in Birmingham begins to feel ill, doctors are mystified: it looks like smallpox, but how could she have caught it? As they try to contain the outbreak, questions about blame and lab safety erupt in a media frenzy, questions that remain today.


For a full list of sources, see the show notes at timharford.com.

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