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 have at least one of the following laboratory test results: serum severe fever with thrombocytopenia syndrome bunyavirus (SFTSV)-specific IgM antibody positive or IgG antibody level increased more than 4 times; or positive for SFTSV RNA; or positive for SFTSV nucleic acid detected by real-time fluorescent quantitative RT-PCR; or SFTSV isolated from case specimens. Exclusion Criteria: * Patients who were found to be positive for other tick-borne pathogens by PCR analysis of 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 lead to inability to move freely; * No outpatient follow-up visit after discharge, and repeated confirmation by phone call still unable to get in touch; * Due to living in other places, nursing homes, welfare homes, unable to participate in outpatient 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.