CD79A and COVID-19: Evaluation of humoral responses in the lung tissue identified higher baseline IgA levels in 3/4 of vaccinated COVID-19+ (subjects #13, #15, and #17) compared to the unvaccinated COVID-19+ (subjects #11, #5, #8, and #18, see Supplementary Table S2); both groups had higher IgA levels than UN samples (Figure 4G).