COVID-19; Pediatric; Primary immunodeficiency disorder; immunoglobulin; sirolimus; triacylglycerol; adolescent; Article; bilateral pneumonia; case report; child; clinical article; common variable immunodeficiency; coronavirus disease 2019; dry cough; fever; human; immune dysregulation; inborn error of metabolism; intensive care unit; kidney function; leukocyte count; male; morbidity; mortality; neutropenia; reverse transcription polymerase chain reaction; thrombocytopenia; X linked agammaglobulinemia