NFKB1 and myocarditis: In this study, we constructed a VMC model by infecting mice with CVB3, and then showed that inhibition of MEG3 could suppress the NF‐κB pathway as well as increase M2 macrophage transition through miR‐223‐mediated down‐regulation of TRAF6, therefore, ameliorating myocarditis in the VMC mice.