FBL and infection: We generated FBL-knockdown RAW264.7 cells by CRISPR-Cas9 gene-editing systems (Supplementary Figures 4A–C), and these Fbl+/- RAW264.7 cells also showed decreased intracellular virus production upon infection of recombinant green fluorescent protein-expressing VSV (GFP-VSV) (Figures 2E–H).