NABA hepatitis 费了我1个小时了

yunhaoll

是蓝皮上面的 实在找不到和OG GWD对应的题号了 大家帮帮我啊

题目

Blood banks will shortly start to screen all donors for NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood.

A Donors carrying NANB hepatitis do not, in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed

A是正确答案  

我觉得既然把5%代NABA的排除了，那剩下的应该就是10%呀，不管他还带什么别的病？？

大侠们能不能帮我详细地分析一下呢？越详细越好 本人比较愚钝 谢谢了

yunhaoll

明白了 

原来除了这项测试还有其他测试 哈

谢谢大家 哈