This effect, observed in both the two‐dose and three‐dose cohorts, did not reach statistical significance in the two‐dose analysis but is consistent with observations from our earlier studies of immune imprinting [ 20 , 21 ].
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BNT162b2 Versus mRNA-1273 Vaccines: Comparative Analysis of Long-Term Protection Against SARS-CoV-2 Infection and Severe COVID-19 in Qatar.
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