The expression of TLR 1 and 6 was very low in both MSC-lung and MSCs-CPAM and, after exposure to SARS-CoV-2, we did not observe a significant variation in TLR1 and TLR6 expression values, while in a condition of active infection and virus replication, these receptors were found to be significantly upregulated. This evidence concerns the gene TLR6 and infection.