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One COVID vaccine dose yields good protection in elderly, 2 studies find – CIDRAP

Two UK studies estimate 65% to 80% protection for the AstraZeneca and Pfizer vaccines.

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As COVID-19 vaccines were first being approved for emergency use in the United Kingdom, the UK Joint Committee on Vaccination and Immunisation decided to extend the interval before the second dose from 4 to 12 weeks to maximize the amount of people who…

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