In New York, doctors report a large number of patients hospitalized with COVID-19 are developing high levels of life-threatening blood clots. This is Dr. J Mocco, vice chair of the Mount Sinai Health System.

Dr. J Mocco: “We began to notice, as the curve and peak started to really take off in New York City, that across all of New York City we were seeing a large number of strokes, and that these strokes were extremely concerning, and they were blocking big vessels to the brain. And in treating these patients, they appeared to be very what we call procoagulant, or making lots of clot.”

Some doctors have begun treating patients with high doses of a blood-thinning drug even before they present symptoms of blood clotting.