A cheap and widely-available steroid drug called dexamethasone has proven to save the lives of critically-ill COVID-19 patients in a British study. It’s estimated many thousands of lives would have been saved around the world if physicians had been aware of the effectiveness of the drug earlier. Test results reported Tuesday from Oxford University in the UK indicated as many as a third of the patients on ventilators improved and survived after receiving dexamethasone. The work was done at a laboratory known as Recovery.