died. We weren’t as lucky with swine flu, which the CDC estimates killed twelve thousand Americans.4 Nearly three-quarters of all emerging and reemerging human diseases arise from the animal kingdom.5 Humanity’s dominion over animals has unleashed a veritable Pandora’s ark of infectious diseases. Most modern human infectious diseases were unknown before domestication led to a mass spillover of animal disease into human populations.6 For example, tuberculosis appears to have been originally acquired through the domestication of goats7 but now infects nearly one-third of humanity.8 Meanwhile,
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