In contrast to moderate, or no, changes in the levels of P RNA, levels of M RNA were significantly decreased following infection of Hep3B-CSDE1C-T cells with VSV-IFNβ, or upon infection of Hep3BP cells with VSV-IFNβ-IGR P/MC-U (Fig. 3B). The gene discussed is IFNB1; the disease is infection.