Mother of a 10-month-old baby reports significant pallor, poor appetite, enlarged abdomen in the baby. As a neonate, the child underwent treatment in the in-patient hospital for jaundice and anemia. Objectively: the skin is pale and jaundiced, teeth are absent, abdomen is enlarged, spleen is palpable. Blood test results: Hb- 90 g/l, RBC- 3,0 × 1012/l, color index - 0,9, microspherocytosis, reticulocytosis up to 20%, serum bilirubin - 37 mmol/l, unconjugated bilirubin - 28 mmol/l. What type of anemia has occurred in the patient?