IFNB1 and infection: WT and HuR KO RAW264.7 cells were infected with 1 MOI HAZV and at 9 h post infection, the expression of Il6, Ifnb, Tnf, Cxcl10, Il10, Il12p40, Ccl2 and Tgfb relative to non-infected control cells and the copy number of S segment inside cells were measured (Fig 2A and 2B).