The goal of this retrospective cohort study is to learn about the clinial characteristics of HFRS patients, explore the risk factors of the occurrence and death of HFRS, and build a risk prediction model for HFRS.

HFRS remains an important public health issue in China, which not only poses a threat to people's physical health and safety, but also has a serious impact on social and economic development. At present, there is no unified standard for clinical prediction of the occurrence and death of HFRS. In order to better prevent and treat HFRS, this multicenter retrospective clinical study is designed to include HFRS inpatients, and collect their demographics, epidemiological history, hospitalization information, clinical manifestation, laboratory results, imaging results, treatment plan and outcome.

Inclusion Criteria:

The patients must meet all of the following criteria:

• Inpatient with clinical diagnosis of Haemorrhagic Fever with Renal Syndrome

Exclusion Criteria:

Exclude patients who meet any of the following criteria:

• Patients with previous chronic kidney disease
• Pregnant or perinatal patients
• Patients unsuitable for inclusion by investigators' evaluation

Inpatients with HFRS diagnosed