# CDC Hepatitis D Basics

CDC 面向公众的丁型肝炎说明，解释 HDV 只能感染已有 HBV 感染的人、传播途径、风险人群、症状、筛查检测和预防。

- Original URL: https://www.cdc.gov/hepatitis-d/about/index.html
- Organization: Centers for Disease Control and Prevention
- Country or region: United States
- Language: en
- Source type: fact_sheet
- Published: 
- Source updated: 
- Last checked: 2026-06-26
- Credibility note: 国家公共卫生机构

## Related Articles

- [Should people who are HBsAg positive be tested for hepatitis D (HDV)?](https://openhbv.com/articles/should-people-who-are-hbsag-positive-be-tested-for-hepatitis-d-hdv.md?locale=en) — Why hepatitis D depends on hepatitis B, which HBsAg-positive people should ask about HDV testing, and what to do after a positive or high-risk result.

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