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. The gene discussed is IFNG; the disease is COVID-19.