CD79A and COVID-19: In particular, 12 individuals had a positive PCR test but no measurable humoral response for anti-SARS-CoV-2 IgGs and/or IgAs (PCR+ Ab−); 38 PCR-positive (+) individuals had detectable IgG and/or IgA anti-SARS-CoV-2 Abs but were not hospitalized (mild COVID-19 cases; PCR+ Ab+ non-hospitalized) and 24 individuals who were positive for both PCR and anti-SARS-CoV-2 Abs had required hospitalization during the course of COVID-19 (severe COVID-19 cases; PCR+ Ab+ hospitalized).