Protective antibodies and T cell responses to Omicron variant after the booster dose of BNT162b2 vaccine.

This showed a highly significant increase between the second (1 week after the second dose) and third dose (2 weeks after the third dose) for Omicron (p < 0.0001), less for Beta (p < 0.005) and not significantly different for original WT and Delta VOCs ( Figure S2 ).

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