CD79A and infection: In conjunction, a recent report attributed the correlation of NABsto that of human protection levels from SARS-CoV-2 after COVID-19 infection [170].After natural infection, usually the host’s immune system will induce secretary immunoglobulin A (mucosal antibody of IgA type) and IgG-mediated systemic antibody-mediated immune responses.Secretory IgA protects the upper regions of the respiratory tract, whereas the IgG know to protect the lower respiratory tract [171,172].