While univariate analysis of the spike-specific IgA antibody levels in serum indicated higher levels in HIV-1-uninfected BNT162b2 mRNA vaccinees compared to HIV-1-uninfected COVID-19 convalescent subjects (Figure 1b, Supplementary Table S2), multivariate analysis adjusting for age, gender, time after second vaccination and time after infection, respectively, showed no significant difference between these groups (Table 5). Here, CD79A is linked to infection.