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Cliff_Dibble t1_j4zpakj wrote

That's interesting, there was a decent amount of migrating between places then.

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Intruding1 t1_j501f2e wrote

As others have pointed out, commercial activity is what made people move. There was definitely a dichotomy where the folks that didn't travel never traveled and those that did were almost constantly on the move. Between wars, pilgrimages, and commercial activity its' easy to imagine how the disease could spread.

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Rear-gunner OP t1_j4zqsk4 wrote

Trade, not migration, whether it's the vector, is debated

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