alternatehistory.com

(Before you ask, I couldn't have posted this in the ASB thread because it bars mass death scenarios.)

Let's say, that, around the time of the Black Death kicking off in Europe, a mutation occurs, causing the Black Death to kill at a faster and more efficient rate, while also making corpses and sick people extremely contagious. This causes all of civilization, excluding Sub-Saharan Africa, Oceania, (Southeast Asia up to Malaya could see polities surviving, put not anything more above that.) and the Americas, to largely collapse with death rates averaging out at ~75%, some places seeing much higher and others much lower.

What next?
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