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1.The test is used to detect the hepatitis antigen in the patient's blood.
该测试用于检测患者血液中的肝炎抗原。
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2. Hepatitis is a serious disease that can be prevented with proper vaccination.
肝炎是一种严重的疾病，可以通过适当的疫苗接种来预防。
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3. Doctors are testing for the presence of hepatitis antigen in patients' blood samples.
医生正在对患者的血液样本进行肝炎抗原的存在测试。