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Manufacturing error clouds Oxford’s Covid-19 vaccine study results – The Telegraph

Some of the vials used in the trial didn’t have the right concentration of vaccine so some volunteers got a half dose, university says

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“You’ve taken two studies for which different doses were used and come up with a composite that doesn’t represent either of the doses,” he said of the figure. “I think many people are having trouble with that.”
Oxford researchers say they aren’t certain why a smaller does would be more effective and they are working to uncover the reason.
Sarah Gilbert, one of the Oxford scientists leading the research, said the answer is probably related to providing exactly the right amount of vaccine to trigger…

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