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Two people in China are being treated for plague, authorities said Tuesday. It's the second time the disease, the same one that caused the Black Death, one of the deadliest pandemics in human history, has been detected in the region -- in May, a Mongolian couple died from bubonic plague after eating the raw kidney of a marmot, a local folk health remedy.
Experts say it's not a question of if, but when, the next global epidemic will happen. But scientists are working to stop the next outbreak in its tracks.