What you need to know about coronavirus on Saturday, May 23

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A version of this story appeared in the May 23 edition of CNN’s Coronavirus: Fact vs. Fiction newsletter. Sign up here to receive the need-to-know headlines every weekday.A comprehensive study published yesterday in the medical journal The Lancet found that seriously ill Covid-19 patients who were treated with hydroxychloroquine or chloroquine were more likely to die or develop irregular heart rhythms.”Our data has very convincingly shown that across the world in a real-world population that this drug combination, whichever way you slice it or dice it, does not show any evidence of benefit, and in fact is immutably showing a signal of grave harm,” said Dr. Mandeep Mehra, the study’s lead author.It’s not the first study to highlight the potentially harmful effects of the medication, but it is by far the largest. It analysed data from more than 96,000 patients across six continents.The study comes just days after US President Donald Trump revealed that he has been taking the medication himself, despite the Food and Drug Administration’s stark 1,000-word warning about the risks. The World Health Organization has also warned against using hydroxychloroquine to treat Covid-19. But Trump does have one high-profile ally in promoting it: Brazilian President …

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