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Time: 2024-03-28T22:09:38Z
URL: http://scholar.google.com/scholar_lookup?title=COVID+vaccine+boosters%3A+the+most+important+questions&year=2021&author=Callaway&journal=Nature&volume=596&issue=7871&pages=178-180&doi=10.1038%2Fd41586-021-02158-6&pmid=34354274