IFNAR1 and infection: Analysis of IFNAR1 protein levels upon infection also demonstrated that IFNAR1 expression in the rFCV 2280 F9-p30 infection group was higher than that in the wild type and rFCV 2280 infection groups (Fig 8C); the IFNAR1 protein level in the rFCV F9-2280 p30 infection group was lower than that in wild type and rFCV F9 infection groups (Fig 8C).