COVID-19 vaccine developed by AstraZeneca, Oxford is up to 90% efficacious

An interim analysis of clinical trial results in the United Kingdom and Brazil showed that a COVID-19 vaccine candidate codeveloped by AstraZeneca and Oxford University had an average efficacy of 70% with no significant safety concerns.One dosing regimen was 90% efficacious when the vaccine, AZD1222, was given as a half dose, followed by a full dose at least 1 month apart. The other dosing

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