People in Oxford University's coronavirus vaccine trial weren't told when they were given a dose that was too small until months later, an investigation has revealed. Ethics experts said they were concerned scientists informed volunteers about the blunder in a letter that was packed with 'gobbledygook'. The error caused controversy late last year when it emerged around 1,500 people taking part in a trial of the Oxford jab had been given a dose that later turned out to be significantly smaller than it should have been. Although academics insist they knew the dose would be smaller, they didn't ...