What doctors have learned about fighting COVID-19:Patients are at increased risk of blood clots, and blood thinning agents can help"Proning" - putting patients on their stomachs to relieve pressure on the lungs - can stave off the need for mechanical ventilation.Besides the respiratory system and lungs, the coronavirus can attack many other organs, including the heart, liver, kidneys, and brain.The most promising treatments so far seem to be the anti-viral remdesivir; dexamethasone, a steroid to treat the body's inflammatory response to COVID-19; and plasma donated by patients who have antibodies to the disease.More widespread testing and quicker results helps relieve pressure on hospitals.Information-sharing among health professionals.