STING1 and viral infectious disease: It has been found that NO2‐FAs, an endogenous substance produced by adding nitrogen dioxide (NO2) to unsaturated fatty acids during virus infection, have been found to modify STING covalently by Michael addition reaction to adjacent cysteines at positions 88 and 91 or N‐terminal histidine, thereby inhibiting STING palmitoylation and type I IFN in host cells.120