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1. The CD antigen test is used to detect the presence of a specific virus in the blood.
CD抗原检测用于检测血液中特定病毒的存在。
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2. The patient was given a CD antigen test to determine if he had been exposed to the virus.
患者接受了CD抗原测试，以确定他是否接触过该病毒。
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3. The CD antigen test has become an important tool for disease prevention and control.
CD抗原测试已成为疾病预防和控制的重要工具。