IL10 and infection: However, both the IL-10 mRNA level in PRRSV-infected cells pretreated with anti-FcγRI IgG or anti-FcγRIII IgG and its protein level in culture supernatants of PRRSV-infected cells pretreated with anti-FcγRI IgG or anti-FcγRIII IgG were significantly upregulated at any time point post-infection, compared to PRRSV-infected-cells pretreated with RNI (Figure 13c and Figure 14b).