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Freakonomics Radio

Are You Really Allergic to Penicillin? (Update)

July 17, 20261h 5m

Show notes

Like tens of millions of people, Stephen Dubner thought he had a penicillin allergy. Like the vast majority, he didn’t. This misdiagnosis costs billions of dollars and causes serious health problems, so why hasn’t it been fixed? We find out in this update of a 2025 episode. SOURCES: Kimberly Blumenthal, allergist-immunologist and researcher at the Mayo Clinic.

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