Durability of immune responses to mRNA booster vaccination against COVID-19

To determine whether the durability of immune responses, in particular, the half-life of serum antibody titers improves after subsequent booster vaccinations and to determine the nAb response against emerging SARS-CoV-2 variants

本研究旨在明确两项核心内容：其一，后续加强疫苗接种后，免疫应答的持久性——尤其是血清抗体滴度的半衰期是否得到改善；其二，针对新发SARS-CoV-2变异株的中和抗体（neutralizing antibody，nAb）应答情况。