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Hydroxychloroquine has not been proved to work against Covid-19 in any significant clinical trials. A small trial by Chinese researchers made public last week found that it helped speed the recovery in moderately ill patients, but the study was not peer-reviewed and had significant limitations. Earlier reports from France and China have drawn criticism because they did not include control groups to compare treated patients with untreated ones, and researchers have called the reports anecdotal. Without controls, they said, it is impossible to determine whether the drugs worked. But Mr. Trump on Sunday dismissed the notion that doctors should wait for further study. (en) |
