A squirrel has tested positive for the bubonic plague in Colorado sparking fears of an outbreak in the US. The animal tested positive on July 11 in the town of Morrison, near Denver - the first case of the infectious disease in the county this year, according to the Jefferson County Public Health department.
Bubonic plague killed up to 200 million people during The Black Death in the 14th century - the worst pandemic in human history.
Due to a recent comeback, the World Health Organisation has categorised it as a re-emerging disease, with approximately 1,000 to 2,000 cases each year.
Two people died in Colorado from the plague in 2015. Modern antibiotics can combat the disease if it is treated promptly, but it remains highly infectious to
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