Markers that were significantly lowered in the MIS-C training cohort compared to the COVID-19 training cohort are albumin (median 3.3 g/dL, p = 9.7×10−7), platelet counts (median 158/μL, p = 7.0×10−7) and sodium (median 134, p = 2.5×10−7). Here, ALB is linked to COVID-19.