Quote:Hmmm...a little difficult to understand what you're saying:
The first case of the Black Death, those histories also recorded, had appeared, without precedent, less than a decade later, and had taken several decades to evolve into a form survivable enough to have time to spread.
You may want to rewrite into something like:
The first recorded cases of the Black Death suddenly appeared in Europe and swept thru the continent in less than three years. It took several decades for human beings to developed sufficient immunity to have a 1 in 3 chance of of survival after infected with the Black Death.
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