ARG2 and influenza: Next, we estimated an ability of the ORNs-d-М to affect the level of LPO products in mice lungs during the influenza virus infection and detected that the ORNs-d-М injection for prevention and treatment can decrease the level of LPO in influenza-infected mice (Figure 1b), which indicates that these ORNs-d-М likely decrease the protein level of nos2, arg2, and xdh during the influenza virus infection.