Laboratory tests revealed thrombocytopenia (51 × 109/L), microangiopathic hemolysis with schistocytes, hepatitis (aspartate aminotransferase 995 U/L), and hyperinflammation (interleukin-6 >500 pg/mL, procalcitonin 35.3 ng/mL). The gene discussed is IL6; the disease is hepatitis A virus infection.