The deadliest epidemic in human history: Zero patient found in "Black Death" that killed hundreds of millions

Deadliest epidemic in human history: First patient found in ‘Black Death’ that killed hundreds of millions

However, the scientists noted that the ancient bacterium arose about 7,000 years ago, when agriculture began to develop in Central Europe. It was reported that the bacterium may have spread sporadically from animals to humans (occurring from time to time and in sporadic numbers in an area) from animals to humans without causing major outbreaks.

After this process, Yersinia pestis eventually adapted to infect humans, eventually evolving into the form known as the bubonic plague, which was spread by fleas and ravaged medieval Europe and caused millions of deaths.

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