There were significant interactions between days after ICU admission and COVID-19 patient outcome (alive versus dead) for IgA (F(1,93) = 13.27, p < 0.001, η2 = 0.13) and for Total Ig (F(1,93) = 9.20, p = 0.003, η2 = 0.09), indicating that patients who died had higher IgA and Total Ig levels earlier in their ICU stay compared to patients who survived. The gene discussed is CD79A; the disease is COVID-19.