Hydroxychloroquine does not work against Covid-19 and should not be given to any more hospital patients around the world, say the leaders of the biggest and best-designed trial of the drug, which experts will hope finally settle the question. “If you are admitted to hospital, dont take hydroxychloroquine,” said Martin Landray, deputy chief investigator of the Recovery trial and professor of medicine and epidemiology at Oxford University. “It doesnt work.” Many countries have permitted emergency use of the drug for Covid-19 patients in hospitals, following claims from a few doctors, including Didier Raoult in France, that it was a cure, and the ensuing clamour from the public. President Donald Trump backed the drug, saying it should be given to patients, and later said he was personally taking it to protect himself from the virus. Landray said the hype should now stop. “It is being touted as a game-changer, a wonderful drug, a breakthrough. This is an incredibly important result, bec..