Hydroxychloroquine: How did an unproven drug become Trump's 'miracle cure'?

The drug has been used to treat a number of diseases in the past half-century but after a French study claimed it was effective against coronavirus it has been hailed by the US president as a cure. But there is scant evidence it is effective - and it could actually be harmful At one of his recent daily press briefings, Donald Trump told his global television audience he was hearing great things about the malaria drug hydroxychloroquine for treating coronavirus. "I think it could be, based on wha...