In addition, our research presented evidence that neither knockdown or mutation of IFITM1 nor extracellular treatment with sIFITM1 affect EBV infection efficiency in B cells (Extended Data Fig. 10a–d), reinforcing the notion that IFITM1’s role in EBV infection is specific to epithelial cell type. Here, IFITM1 is linked to Epstein-Barr virus infection.