A 10-month-old infant experienced a high fever and, following the fever, had normal platelet counts but persistently low white blood cell and neutrophil counts. During this period, the child was hospitalized and received treatment with blood-building tonics, as well as medications such as Rui Bai and Hui Er Xue. However, the effects were not satisfactory. There were mild fever and rash reactions after the injection of Hui Er Xue. Inquiry about the diagnosis and treatment methods for this condition.