However, MIS-C patients have higher fibrinogen, CRP, ESR, and prohormone-B-type natriuretic protein (proBNP) levels and lower ferritin levels and lymphocyte counts than MAS (Aydın et al., 2021; Otar Yener et al., 2021). Here, NPPB is linked to COVID-19–associated multisystem inflammatory syndrome in children.