How the body douses the fires of infection


THAT red, painful swelling around a wound is the body’s way of fighting infection. But too much inflammation can be bad news. It can kill flu victims, and chronic inflammation has been implicated in a range of illnesses, from eczema to Alzheimer’s. Now Charles Serhan and his colleagues at Harvard University have discovered how inflammation normally turns itself off once the crisis has passed. At the site of wound, molecules called chemokines rally white blood cells, or leukocytes,
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