The objective of this observational study was to understand the changes in laboratory indicators and clinical manifestations of dengue patients at various ages, and to provide new ideas for the treatment and prevention of dengue. The main questions it aims to answer are: 1 What are the key abnormal items in blood routine indicators of dengue patients? 2 Does dengue affect liver function in patients? Will there be liver damage? And when? 3. What are the specific clinical manifestations of dengue patients?

• Inclusion Criteria**:

  • Meet the clinical diagnostic criteria for dengue fever, with blood indicators showing that the dengue antigen is positive.
  • No age limit for inclusion.
  • Voluntarily agree to participate in the study and sign the informed consent.
  • Complete clinical data available, including symptoms and laboratory tests, to support subsequent analysis.

• Exclusion Criteria**:

  • Incomplete or unavailable clinical data. Patients will be excluded if sufficient laboratory data and symptoms cannot be collected.
  • Unable to understand or unwilling to sign the informed consent for any reason.

The subjects in this study were dengue fever patients.