COVID-19, coronavirus disease 2019; SA, Saudi Arabia; ICU, intensive care unit; MIS-C, multisystem inflammatory syndrome in childhood; KD, Kawasaki disease; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; SMOH, Saudi Ministry of Health; PICU, pediatric intensive care unit; ECG, electrocardiogram; CRP, C-reactive protein; ALT, alanine aminotransferase; AST, aspartate aminotransferase. The gene discussed is CRP; the disease is Kawasaki disease.