CD79A and COVID-19: Immunoglobulin levels measured during acute COVID-19 presented moderate to no correlation with each other: IgG levels (Figure 3A, left and middle plots) showed a moderate correlation with IgA (r=0.6927, p<0.001), but none with IgE (r=0.1896, p>0.05), whereas showing a weak correlation between IgA and IgE levels (r=0.4590, p<0.05; Figure 3A, right plot).