CRP and Hyponatremia: Other laboratory markers obtained in the acute phase of MIS-C have been associated with PICU admission, like elevated ESR (>30 mm/h), CRP (>5 mg/dL), ferritin, PCT, thrombocytopenia, lymphopenia, hyponatremia, and decreased serum albumin levels [8,26,27,31,35,45,46].