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About 15% of pregnant women admitted to two maternity wards in northern Manhattan in late March and early April were already infected with the new coronavirus; the vast majority had no symptoms.

Unlike artificial sweeteners, real sugar sends signals to the brain when it enters the gut, a new study by Columbia neuroscientists has found.

The brainchild of Vibhu Krishna, a medical student at Columbia’s Vagelos College of Physicians and Surgeons, "Faces of the Frontline," shares stories on Instagram from the COVID-19 front line.

Susannah Hills, MD, provides tips for making a homemade face covering, what materials to use, how to avoid contamination when donning and doffing your mask, and why masks are like underwear.