As recent studies have shown, some tests for H1N1 infection are not entirely reliable, and false-negative results are a frequent problem.

最近的研究显示，用于H1N1感染的有些检测方法不完全可靠，所以假阴性结果是经常出现的问题。

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We are grateful to Emily Rapp for sharing her personal story, including the occurrence of false-negative test results.

我们非常感激艾米丽的分享，其中包括检测结果为假阴性这件事情的发生。

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Pharmaceutical giant Abbott Laboratories Inc. recalled about 750, 000 test kits believed to give false negative results.

制药业巨头雅培公司召回75万试剂，确信它们测出了错误的阴性结果。

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False-negative results, which are rarer, also present a quandary for women and doctors who may not find out until much later that a fetus has an abnormality.

WSJ: New Questions on Cutting-Edge Prenatal Tests