IFNB1 and viral infectious disease: Data from LDH release assay showed that cell cytotoxicity, though increasing with the prolonged viral infection time, did not reach significant difference in IECs at MOI 5 for 2–48 hpi (48 hpi: 4.8% ± 1.5%, p value = 0.09), as seen in Figure 4C. In addition, the mRNA expression of host antiviral innate immunity genes Ifnβ, Cxcl10, and Mx1 were induced by AiV infection, as seen in Figure 4D–F.