# Ancient DNA reveals how plague kept returning for 400 years after the Black Death

> **Open Intelligence Dossier** · First detected: 2026-09-20 23:40 UTC · Category: Health

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*Canonical Source: https://pulse.byoviral.com/trend/2026-09-20/ancient-dna-reveals-how-plague-kept-returning-for-400-years-after-the-black*