The steroid dexamethasone has been found to save the lives of one third of the most serious COVID-19 cases, according to trial results hailed Tuesday as a "major breakthrough" in the fight against the disease. Researchers led by a team from the University of Oxford administered the widely available drug to more than 2,000 severely ill COVID-19 patients. Among those who could only breathe with the help of a ventilator, dexamethasone reduced deaths by 35 percent, and it reduced deaths of those receiving oxygen by a fifth, according to preliminary results.
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