In response, authorities, individuals on own initiative or requested by employers, clubs or airlines, increased the number of tests performed, both for the diagnosis of SARS-CoV-2 infection (molecular or PCR test) and the diagnosis of past infection in symptomatic and asymptomatic individuals through the identification of antibodies to SARS-CoV-2, ie, the determination of seroprevalence of IgG, IgA, and IgM [8-10]. The gene discussed is CD79A; the disease is infection.