Volunteers in the Oxford-AstraZeneca vaccine trial are to be “unblinded” so they can receive potentially life saving Covid vaccinations quickly, the Telegraph has learnt. Tens of thousands of people around the world who have participated in phase three trials of Covid vaccines remain unsure as to whether they received a placebo or the real thing. It has posed a difficult ethical dilemma now the first vaccine has been approved for use, with scientists keen for trials to continue to collect added data, but participants worried that they may be forgoing protection which will soon be available to all. At least one death has been reported among the placebo group of the Moderna phase three vaccine trial in the US, and others will inevitably follow in the months ahead. While deaths were unavoidable at first, now that vaccines have been proved efficacious they are not. Participants in the Oxford-AstraZeneca trial have been told their status will be “unblinded” once they are offered an approved coronavirus vaccine by the NHS, ensuring that they will not be left unprotected for long. “They have said that essentially, once the vaccine comes out into mass circulation, they will unblind everyone,” said Lottie Gross, a 29 year old volunteer.