阴性和阳性是实验结果的判别方式之一，被称为定性检查，阴性的含义类似于“无”；而阳性的含义类似于“有”。
所有4名患者均获得H5N1阳性结果。
但是，大约有十分之一进行额外筛查的被试出现假阳性结果。
However, about one in ten of the women who were given extra screening got false-positive results.
由于社会对感染者存有偏见，因此假阳性结果也会造成伤害。
Social prejudice against the infected means that a false positive also causes harm.
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