IFNB1 and infection: Furthermore, the expression profiles of IFNβ, ISG56, M1, and NS1 mRNA were unaffected by ASN2 treatment of cells infected with the rWSN PB1-Y499H virus, whereas an induction of IFNβ and ISG56, and inhibition of M1 and NS1 was observed in the presence rWSN infection (Fig. 6C–D).