Chinese authorities have confirmed one case of bubonic plague in a city in Inner Mongolia in China. A second suspected case has also been reported.
The bubonic plague, caused by a bacterial infection, was responsible for one of the deadliest epidemics, called the Black Death. It killed about 50 million people across Africa, Asia, and Europe in the 14th century and is typically transmitted from animals to humans by fleas. However, the plague can now be treated with antibiotics.