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Study flowchart. *Among COV‐Yes subjects, 20 out of 74 in the Main cohort and 7 out of 93 in the Confirmatory cohort had SARS‐CoV‐2 infection a few days after the 2nd vaccine dose (February–March 2021). All other subjects had SARS‐CoV‐2 infection prior to the 1st vaccine dose.
