hepatitis B virus

例句：

1. 1. Hepatitis B is a serious disease that can cause liver damage.
   乙型肝炎是一种严重的疾病，可以导致肝脏损伤。
2. 2. The patient was diagnosed with hepatitis B after testing positive for the virus.
   这名患者经过检测确认感染了乙型肝炎病毒。
3. 3. Vaccines are used to prevent hepatitis B infection in people who are at high risk of exposure.
   疫苗用于预防高风险人群的乙型肝炎病毒感染。