However, levels of IFN-γ which is not known to be strongly associated with KD is markedly increased in PIMS-TS as well as COVID-19, [4–6] signifying that IFNγ may be important in the pathogenesis of PIMS-TS and COVID-19, thus implying the role of T- cells, NK- cells and macrophages. Here, IFNG is linked to COVID-19–associated multisystem inflammatory syndrome in children.