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    Neanderthals May Be to Blame for Your Allergies

    This is something to sneeze at. Interspecies sex with early humans gave us genes that bolstered our immunity — but they may also boost susceptibility to allergies. Researchers have discovered genes from Neanderthals and Denisovans that they believe affect “innate immunity,” which helped early humans survive the new diseases they encountered as they migrated around the world. But those same genes also make modern immune systems go haywire in response to pollen and animal hair, and scientists are investigating whether they still help us ward off pathogens today.

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