History I / Big History and Environmental History
Practice question · Multiple choice

Why did Eurasian populations carry epidemic diseases that American populations did not?

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  1. Smallpox, measles, influenza, what do these have in common in origin?
  2. Which continent had large domesticable herd animals?
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C. Millennia of living beside domesticated herd animals

Why

They are zoonoses: the price Eurasia paid for cattle, pigs, and horses was millennia of livestock disease crossing over, and the immunity that came with surviving it. The Americas had almost no herd domesticates and therefore no exposure.

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