In PBMCs, the expression of several AD markers was altered by SARS-CoV-2 infection, such as TGFB1, SERTA domain-containing protein 3 (SERTAD3), glutathione S-transferase M3 (GSTM3), kinase D-interacting substrate of 220 kDa (KIDINS220), natural killer tumor recognition sequence (NKTR), arylsulfatse B (ARSB), and insulin-like growth factor 1 (IGF1) (Fig. 3a). This evidence concerns the gene GSTM3 and Alzheimer disease.