In the 14th century, the bubonic plague swept through the Middle East Asia and Europe. In Europe, it wiped out as many as 50 million people or more than half the continent.

Colorado health officials have confirmed a human case of the plague, the rare bacterial infection infamously known for killing tens of millions in 14th century Europe. Today, it's easily treated ...

In the 14th century, the bubonic plague swept through the Middle East Asia and Europe. In Europe, it wiped out as many as 50 million people or more than half the continent.