# CDC Hepatitis D Basics

OpenHBV source page: https://openhbv.bangbo.dev/sources/cdc-hepatitis-d-basics?locale=zh-CN
Canonical Markdown: https://openhbv.bangbo.dev/sources/cdc-hepatitis-d-basics.md?locale=zh-CN
Original source URL: https://www.cdc.gov/hepatitis-d/about/index.html

## Metadata

- Organization: Centers for Disease Control and Prevention
- Country or region: United States
- Language: en
- Source type: fact_sheet
- Published: not listed
- Updated: not listed
- Last checked by OpenHBV: 2026-06-26
- Credibility note: 国家公共卫生机构

## Summary

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。

## Related OpenHBV Articles

- Apakah orang dengan HBsAg positif perlu tes hepatitis D (HDV)?
  URL: https://openhbv.bangbo.dev/articles/apakah-orang-dengan-hbsag-positif-perlu-tes-hepatitis-d-hdv?locale=zh-CN
  Markdown: https://openhbv.bangbo.dev/articles/apakah-orang-dengan-hbsag-positif-perlu-tes-hepatitis-d-hdv.md?locale=zh-CN
  Summary: Mengapa hepatitis D bergantung pada hepatitis B, siapa yang perlu bertanya tentang tes HDV, dan apa langkah setelah hasil positif atau risiko tinggi.
- Should people who are HBsAg positive be tested for hepatitis D (HDV)?
  URL: https://openhbv.bangbo.dev/articles/should-people-who-are-hbsag-positive-be-tested-for-hepatitis-d-hdv?locale=zh-CN
  Markdown: https://openhbv.bangbo.dev/articles/should-people-who-are-hbsag-positive-be-tested-for-hepatitis-d-hdv.md?locale=zh-CN
  Summary: 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.
- HBsAg 阳性的人要不要查丁肝（HDV）？
  URL: https://openhbv.bangbo.dev/articles/hbsag-hdv?locale=zh-CN
  Markdown: https://openhbv.bangbo.dev/articles/hbsag-hdv.md?locale=zh-CN
  Summary: 解释丁型肝炎为什么只发生在乙肝感染背景下、哪些 HBsAg 阳性人群应和医生讨论 HDV 检测，以及阳性或高风险时下一步怎么做。

## Use Notes

This page is a source record, not medical advice. Use the original source URL above to verify claims, publication details, and updates. OpenHBV records the last checked date so readers and LLM retrieval systems can judge freshness.