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Immune Science

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sweet wormwood plant

GREEN MEDICINE  Derived from sweet wormwood plants, the antimalarial compound artemisinin usually composes 0.1 to 1 percent of the dry weight of the leaves. New research more than triples a plant’s yield of artemisinin, to 3.2 percent.

tattoo

TAIL TATS  When researchers tattooed mouse tails, the only cells found with ink inside were macrophages. The tattoo appeared the same before (left) and after (right) ink-holding macrophages were killed, because it was recaptured by new macrophages.

map of flu activity

IT’S HERE  Flu activity is widespread across the county, with 32 states and Puerto Rico reporting high activity (orange to red) as of January 13, according to the U.S. Centers for Disease Control and Prevention.

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