IFNA1 and infection: At 6 hours post-infection, the levels of IFNβ (IFNB) remained nearly unchanged, while the levels of IFNα1 (IFNA1) and the other antiviral effectors like MxA, ISG 56, OAS and PKR were only marginally increased in cells infected with the wild type BAC36 virus compared to mock infected cells (Fig. 5).