The World Health Organisation has recommended the use of steroids to treat critically-ill Covid-19 patients after a study found that steroids reduced the risk of death by 20%. The WHO's clinical care lead, Janet Diaz, said the agency had updated its advice to include a "strong recommendation" for use of steroids in patients with severe and critical Covid-19. "The evidence shows that if you give corticosteroids, there are 87 fewer deaths per 1,000 patients," Diaz told a WHO social media live event. The trials - conducted by researchers in Britain, Brazil, Canada, China, France, Spain, and the United States - have all concluded that steroids help.