Introduction
Although neutralizing antibody titers are clearly correlated with protection against SARS-CoV-2 infection and severe illness,1,2 they gradually wane and have limited capacity in maintaining cross-neutralization potency against…

Although neutralizing antibody titers are clearly correlated with protection against SARS-CoV-2 infection and severe illness,1,2 they gradually wane and have limited capacity in maintaining cross-neutralization potency against…