ACE2 as well as Fas‐L (Fas‐Ligand) and TMPRSS4 (transmembrane serine protease 4), two additional genes involved in the infection process of SARS‐CoV‐2 were not expressed neither in AD‐MSCs, WJ‐MSCs nor in BM‐MSCs. Here, TMPRSS4 is linked to Alzheimer disease.