A 6-month Follow-up Study of Patients With Severe Fever With Thrombocytopenia Syndrome

Inclusion Criteria:

• Age and gender are not limited;
• Hospitalized patients diagnosed with severe fever with thrombocytopenia syndrome haveat least one of the following laboratory test results: serum severe fever withthrombocytopenia syndrome bunyavirus (SFTSV)-specific IgM antibody positive or IgGantibody level increased more than 4 times; or positive for SFTSV RNA; or positive forSFTSV nucleic acid detected by real-time fluorescent quantitative RT-PCR; or SFTSVisolated from case specimens.

Exclusion Criteria:

• Patients who were found to be positive for other tick-borne pathogens by PCR analysisof blood samples in the acute phase;
• It is difficult to conduct outpatient follow-up due to mental disorders, dementia,combined diseases such as osteoarthropathy, stroke, pulmonary embolism, etc. that leadto inability to move freely;
• No outpatient follow-up visit after discharge, and repeated confirmation by phone callstill unable to get in touch;
• Due to living in other places, nursing homes, welfare homes, unable to participate inoutpatient follow-up after making an appointment by phone;
• Currently participating in clinical trials of other drugs or medical devices;
• The researchers think it is not suitable for inclusion.