CD79A and COVID-19: Interestingly, we found significant correlations between the levels of IgA and IgG antibodies against all of the SARS-CoV-2 strains in the COVID-19 patients on day 14 and day 28, with the ρ and P values on day 14 as follows: Wuhan strain (ρ = 0.70, P = 0.010), Alpha variant (ρ = 0.63, P = 0.024), Delta variant (ρ = 0.77, P = 0.003), and Omicron variant (ρ = 0.68, P = 0.011) (Fig. 3A–D).