IFNA1 and viral infectious disease: As reported, IFITs, especially IFIT1, are commonly upregulated in response to increased expression of type I interferon (IFN‐α or IFN‐β) after virus infection, followed by a strong activation of downstream type I interferon signaling.[26] Accordingly, we performed qRT‐PCR to evaluate the mRNA levels of IFN‐α1, IFITs, and downstream genes in type I interferon signaling pathways.