Scientists are warning that long dormant diseases might make a comeback. Climate change has caused the permafrost to melt in areas where disease-causing germs may have been buried.
Oregon health officials have confirmed that a teenager was diagnosed with the Bubonic plague.
A city in northwestern China has been quarantined as a precautionary step after a man died from the Bubonic plague.
The Angeles National Forest has closed down some of the campgrounds after a squirrel tested positive for the plague.
Archaeologists have found 13 skeletons beneath the ground in central London.