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

So here's something fascinating - the Black Death didn't just vanish after that catastrophic wave between 1347 and 1353. Researchers at the University of Tartu have reconstructed 26 genomes of the plague bacterium from archaeological remains across Europe, showing that the disease kept coming back for over four centuries. What's really striking is that plague didn't spread from a single source each time - instead, it resurfaced in different regions and created new reservoirs, with a major expansion happening around 1450-1500 when the bacterium split into three important branches. Climate factors like the Great Renaissance Drought may have played a role in these waves, and the team even developed new methods to pinpoint exactly when ancient infections occurred, which is a game-changer for understanding historical pandemics.
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