CMPK2 and bird disease: Using GFP reporter viruses of influenza A virus (IAV), a member of the Orthomyxoviridae family that causes respiratory diseases, Newcastle disease virus (NDV), a highly contagious avian disease agent belonging to the Paramyxoviridae family, and vesicular stomatitis virus (VSV), which belongs to the Rhabdoviridae family [40–43], we found no significant difference in the percentage of GFP-positive cells upon CMPK2 induction, as determined by flow cytometry (Fig 3A and 3G–3I).