It is a "major breakthrough" that can significantly reduce deaths among the very sickest of Covid-19 patients.
A low-cost, widely used anti-inflammatory drug improved survival in patients with Covid-19, the first treatment to show life-saving promise months into the pandemic.
Professor Peter Horby, Professor of Emerging Infectious Diseases and Global Health, has said that dexamethasone is the 'only drug shown to reduce mortality'.
Around 90% of experimental vaccines never reach the clinic because of problems in development or manufacture.
The last few months for most of us have been not just bizarre - but scary. Hundreds of thousands have caught the coronavirus and tens of thousands have died - and that will rise.