IFNA1 and infection: IFN-A genes exhibited transient expression with mRNA levels accumulating between 4 and 8 h (IFN-A1, A2, A8, A10, A14, A16 and A17) or between 6 and 12 h (IFN-A5 and A7) post-infection (p.i), whereas IFN-A4, A6 and A21 genes were weakly induced (Fig. 1A-B).