If they were in regular contact, why did smallpox have such a devastating effect... | Hacker News

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		phreeza on June 27, 2019 \| parent \| context \| favorite \| on: The “backfire effect” is mostly a myth, a broad lo... If they were in regular contact, why did smallpox have such a devastating effect on Americans?

Retric on June 27, 2019 [–]

Population density. Smallpox dies out with lot’s of tiny isolated communities with minimal contact to each other.

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