Although the elevation of IFN-γ in COVID-19 patients with mild/moderate symptoms have already been demonstrated by our group (9), the present study found significant positive correlations between the levels of IFN-γ with SIgA, IFN-α, IL-6, and IL-13 which were found in the same group in salivary samples obtained two months after SARS-CoV-2 infection, which we found particularly concerning. This evidence concerns the gene IL13 and COVID-19.