ài zī bìng / jiǎn cè / cún zài / yī gè / kōng chuāng qī / qī jiān / kě néng / jiǎn cè / bù chū / bìng dú

艾滋病检测存在一个空窗期，期间可能检测不出病毒。

There is a window period in HIV testing during which the virus may not be detected.