Figure 1 Research flowchart. Severe fever with thrombocytopenia syndrome nucleic acid tests were performed on the first or second day of admission. During hospitalization, ECG monitoring was performed daily and blood pressure and pulse were recorded. Clinical symptoms and signs of patients were recorded daily, with the focus on the observation of neurological symptoms. During the first and second weeks of hospitalization, routine blood, biochemical, urine, coagulation, and inflammatory indexes were checked daily. During the third and fourth weeks of hospitalization, laboratory tests were performed according to the patient’s condition. (Made by Microsoft office Word 2007, Microsoft USA).