UKRAINE - 2020/04/06: In this photo illustration, vials labelled as Coronavirus vaccine and a syringe seen displayed as the world anxiously awaits for the vaccine against coronavirus. (Photo Illustration by Igor Golovniov/SOPA Images/LightRocket via OXFORD, England - Researchers in England say they have the first evidence that a drug can improve COVID-19 survival: A steroid called dexamethasone reduced deaths by up to one third in severely ill hospitalized patients.Results were announced Tuesday and researchers said they would publish them soon.