ALB and macrophage activation syndrome: Analysis of laboratory parameters showed that on admission, MIS-C patients fulfilling MAS criteria had already significantly lower median of lymphocyte (0.74 vs. 1.16 103/μL) and platelet (140 vs. 188 103/μL) counts, albumin (3.1 vs. 3.4 g/dL), and sodium (132 vs. 135 mmol/L) levels compared with patients without MAS.