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Oxford COVID-19 vaccine developer cautious on 2020 roll-out

Oxford COVID-19 vaccine developer cautious on 2020 roll-out

Oxford COVID-19 vaccine developer cautious on 2020 roll-out The experimental vaccine, which has been licensed to AstraZeneca, produced an immune response in early-stage clinical trials, data showed on Monday, preserving hopes it could be in use by the end of 2020.