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New genetic and patient analyses suggest severe COVID is linked to overactive complement, one of the immune system’s oldest branches, and excess blood clotting.

Based on their experience treating COVID-19, Columbia physicians have assembled critical information about the coronavirus’s effects on organs outside the lungs.

New eye drops could prevent vision loss after retinal vein occlusion, a major cause of blindness for millions of adults, a study by Columbia University researchers has found.

Five physician-scientists at the medical school—Rebecca Hough, Benjamin Izar, Jared Kushner, Stuart Weisberg, and Kelley Yan—have received awards from the Louis V. Gerstner Jr. Scholars Program.