Fig. 5From: The emerging landscape of circular RNAs in immunity: breakthroughs and challengesCircRNA and viral infection. CircRNAs act as miRNA sponge to regulate downstream molecules, which affects virus replication and immune microenvironment, producing promote or inhibit effect in viral activity. MAP3K9:Mitogen-activated protein kinase kinase kinase 9. RIG-I:Retinoic acid inducible gene I. FSTL1:Follistatin-related protein 1. IFN:InterferonBack to article page