As shown in Table 5, there are two positive KEGG pathways related to MUC1 (Coronavirus disease, COVID-19 and Ribosome) and two negative KEGG pathways related to MUC1 (Staphylococcus aureus infection and Intestinal immune network for IgA production) (Fig. 3D). This evidence concerns the gene MUC1 and staphylococcus aureus infection.