Two people got the plague in China. Why is it still a thing?

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.
Source: CNN.com - Health - Category: Consumer Health News Source Type: news