coronavirus drug treatment has shown that giving low doses of a generic steroid drug to patients admitted to hospital with Covid-19 reduced death rates by around a third among those with the most severe cases of infection.Hailing as a 'major breakthrough', Dexamethasone, a cheap and widely used steroid, has become the first drug shown to be able to save lives among Covid-19 patients.What is Dexamethasone?Results of trials announced on Tuesday showed dexamethasone, which is used to reduce inflammation in other diseases, reduced death rates by around a third among the most severely ill COVID-19 patients admitted to hospital.The results suggest the drug should immediately become standard care in patients with severe cases of the pandemic.