One in four patients who arrive at Boston Medical Center with COVID-19 go into the intensive care unit, says Nicholas Bosch, a pulmonary and critical care fellow at BMC and a master of science in epidemiology student at the Boston University School of Public Health. Bosch is leading a randomized controlled trial at BMC to see if having COVID-19 patients start lying prone (that is, on their stomachs) soon after arriving at the hospital can help keep their symptoms from getting worse. The trial will begin as soon as possible, pending final regulatory approval.