Long-term humoral and cellular immunity against vaccine strains and Omicron subvariants (BQ.1.1, BN.1, XBB.1, and EG.5) after bivalent COVID-19 vaccination

BackgroundThe assessment of long-term humoral and cellular immunity post-vaccination is crucial for establishing an optimal vaccination strategy.MethodsThis prospective cohort study evaluated adults (≥18 years) who received a BA.4/5 bivalent vaccine. W…

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