GFM1 and infection: There was no significant difference in the spread of SFV4(3H)-FFLuc-Egf1.0F and SFV4(3H)-FFLuc-Egf1.0R (p = 0.64) following low MOI infection (0.005), indicating that Egf1.0 had no effect on dissemination of SFV in this mammalian cell line (Fig. 6B).