Study: Oldest signs of plague outbreaks found in prehistoric graves
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June 17 (UPI) -- Scientists have found the oldest known signs of a plague outbreak in DNA evidence from hunter-gatherer graves in Siberia, a study published Wednesday in the journal Nature said. The researchers said the study involves early plague strains from outbreaks starting about 5,500 years ago among hunter-gatherers living near Lake Baikal in southeast Siberia. The graves studied contained skeletons from multiple generations, the study said. Testing on the skeletons' teeth showed DNA
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