A special circuit in the brain of the worm C. elegans controls whether they mount their own chemical defenses or take advantage of the protection conferred by bacteria nearby.
Experts offer a new hypothesis as to the cause of the excess of fluid that results in potentially life-threatening breathing difficulties in COVID-19 patients.
Independent mutations in different regions of an immune protein allow it to perform to different jobs, shedding light on how proteins may have evolved to be multipurpose.
Immune cells that first appear during embryonic development eventually take over the kidneys of older mice, which may help explain why these organs become more prone to disease with age.