Considering the detection values above the positive control established through the commercial test (ratio ≥ 1.1), the number of positive samples for specific IgA for SARS-CoV-2 was 52 out of 97 (53.6%) HCWs and 26 out of 37 (70.3%) in patients with COVID-19. The gene discussed is CD79A; the disease is COVID-19.