While we did not observe an association between the frequencies of antigen-specific populations (e.g., ASCs or HLA-DR+CD38+ CD8+ T cells) at the acute time point and the level of ZIKV neutralizing antibody titers at 6 months post-infection (Figures S5E and S5F), we did find unique sets of features associated with high versus low levels of ZIKV neutralizing antibody titers. Here, CD38 is linked to infection.