Why did the Black Death spread so quickly?

In the 14th century the Black Death ravaged Asia and Europe, killing up to 200 million in total, including around 60% of the population of London.

It has long been assumed that the disease spread so quickly because of rats, but new evidence unearthed in London now suggests that it was an air-borne disease. So it was not bubonic plague but a pneumonic plague.

See story here.


 




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