CGAS and viral infectious disease: cGAS recognizes abnormal exogenous and endogenous DNA, promotes activation of multiple immune stimulators, autophagy, remodeling of tumor environment, and production of inflammatory factors through cGAS-STING signal pathway, and plays an important role in inflammation, autoimmunity, anti-tumor, anti-bacterial, and viral infection (28, 32, 33, 38, 42–46).