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It acts as a sort of molecular fumigator to battle phages and plasmids.

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Manipulating a newly identified neural circuit can curb appetite—or spur massive overeating.

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Certain infectious diseases, such as COVID or the flu, evolve constantly, shapeshifting just enough to outmaneuver our immune systems and reinfect us repeatedly. But subsequent reinfections often don’t lead to the most severe outcomes—for very good reason. Upon first exposure to a pathogen, our immune systems churn out specially trained B cells, which have learned to identify and eliminate the virus.

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The U.S. is currently in the midst of yet another West Nile virus (WNV) outbreak, with the CDC documenting 880 cases across 46 states so far this year.

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Researchers have identified how the architecture of brain circuits helps different species flexibly adapt to new mating signals across evolutionary timeframes.

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New findings on how past viral respiratory infections affect future, unrelated ones could lead to therapies for boosting general antiviral immunity—and potentially better pandemic preparedness.