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AstraZeneca would have run the Oxford coronavirus vaccine trials differently if it had been in charge, a boss at the pharmaceutical giant has said. The study of the vaccine became confused and produced two possible levels of efficacy after one batch of the jabs was found to be half as potent as the rest.   While a group of people given the full two doses of the jab saw it block 62 per cent of coronavirus infections, people given 1.5 doses showed a better 90 per cent. The difference had emerged when a problem in the manufacturing process saw the researchers presented with a batch of the vaccine that they weren t sure how strong it was, so they gave participants half as much. It later turned out it was a normal strength and the people had only been given half a dose. 

City ofUnited kingdomAndrew pollardMatt hancockOxford astrazenecaChris hopsonSarah gilbertMichael goveBoris johnsonOxford university instituteWorld health organizationOxford universityRegulatory agencyMene pangalosAndrew marr showNew year