Humans Might Be So Sickly Because We Evolved to Avoid a Single Devastating Disease – ScienceAlert

Hundreds of thousands of years ago, our ancestors evolved a simple trick that could have helped thwart a major infectious disease. It probably saved our skins, but the change was far from a perfect solution. 
New research has uncovered evidence that mutations arising between 600,000 and 2 million years ago were part of a complex of adaptations that may have inadvertently made us prone to inflammatory diseases and even other pathogens.
An international team of researchers compared around a thou…

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