U of M study: Hydroxychloroquine a poor defense against Covid-19

Anti-malaria drug hydroxychloroquine, which has become a hotly debated potential countermeasure to the coronavirus that causes Covid-19, does little to protect against the disease, University of Minnesota researchers have found. The Star Tribune reports on the study, the nation's first randomized trial of the drug's usefulness as a preventative measure for people who have been exposed to Covid-19 but haven't developed the disease yet. President Donald Trump, who has been promoting the potential…