乙肝病毒及其抗原一发现，布伦·伯格和他的研究小组就设计实验，以便在输血前对献血者进行鉴别。因为输血经常传播乙肝这种传染病。
Once the virus and its antigen were found, Dr Blumberg and his team devised tests for it, so that donors could be screened before giving the blood that often transmitted the infection.
确定西尼罗河病毒的输血传染性。
这个术语描述了参与追踪过程的单元，即人们在输血中可能被一个可传染的病毒感染。
It is the term given to describe the processes involved in tracing units that may have been infected with a virus transmissible through blood, which were transfused to recipients.
这个术语描述了参与追踪过程的单元，即人们在输血中可能被一个可传染的病毒感染。
It is the term given to describe the processes involved in tracing units that may have been infected with a virus transmissible through blood, which were transfused to recipients.
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