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Q&A How would industrial civilizations contacting each other for the first time protect themselves from diseases?

In a world big enough for human civilizations as knowledgeable about medicine as ours to develop without contacting each other, how could they initiate that contact without exposing each other to p...

8 answers  ·  posted 7y ago by Gattaract‭  ·  last activity 6y ago by Gattaract‭

Question civilization humans diseases sea medicine