We next examined if the three antibody patterns (IgG‐dominated, IgA‐dominated, and negative) were associated with PCR‐verified Covid‐19, Covid‐19 symptoms, T‐cell responses to SARS‐CoV‐2, demographic parameters (age, sex, weight, BMI, primary healthcare center), and comorbidities by making a multivariate Orthogonal Projections to Latent Structures by means of Partial Least Squares Discriminant Analysis (OPLS‐DA) model. This evidence concerns the gene CD79A and COVID-19.