ACTB and infection: The results demonstrated a gradual 2.1-fold (p-EGFR/β-actin ratio) and 1.7-fold (p-EGFR/EGFR ratio) increase in the expression of phosphorylated EGFR (p-EGFR) protein in RSV-infected cells (MOI 0.1) at 30 and 60 min post-infection (Figure 3A).