IFNB1 and Epstein-Barr virus infection: It’s believed that analyzing the transcriptional expression level of BFRF1 in plasmid transfected cells and EBV lytic infected cells induced from EBV latent cells can help us to confirm whether the plasmid transfected BFRF1 has similar inhibitory effect of IFN-β production with that of BFRF1 during EBV infection.