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PubMed COVID-19 Clinical Care

911 - 920 of 2196 results found

Risk of COVID-19 after natural infection or vaccination

Date
Friday, September 22, 2023 - 4:00 AM
Description
BACKGROUND: While vaccines have established utility against COVID-19, phase 3 efficacy studies have generally not comprehensively evaluated protection provided by previous infection or hybrid immunity (previous infection plus vaccination). Individual