The plague rarely affects humans, though the US sees about 7 cases a year. Here’s why

Colorado health officials are investigating a suspected case in a human of the plague, the rare bacterial infection is infamously known for killing tens of millions in 14th century Europe Health ABC News: Health

​Colorado health officials are investigating a suspected case in a human of the plague, the rare bacterial infection is infamously known for killing tens of millions in 14th century Europe