五家公司的试剂盒，对同一批血液样品进行测试，两家测出少量阳性，三家全部阴性。显然，要溯源病毒源头，光靠抗体测试，还不够，假阳性假阴性都需要额外的参考标准。 In order to evaluate the performance of the test kits, the ministry also tested 500 blood donation samples collected from January to March in 2019 in Japan's Kōshin'etsu region. Two out of the five firms showed positive results, indicating that two people were found to be positive, which accounted for 0.4 percent of the total.http://news.cgtn.com/news/2020-05-15/-False-positive-of-COVID-19-possible-in-2019-blood-samples-in-Japan-Qwi3TQV0Zy/index.html
【在 robertfrost(robertfrost)的大作中提到：】 ：五家公司的试剂盒，对同一批血液样品进行测试，两家测出少量阳性，三家全部阴性。显然，要溯源病毒源头，光靠抗体测试，还不够，假阳性假阴性都需要额外的参考标准。 ：In order to evaluate the performance of the test kits, the ministry also
【 在 robertfrost (robertfrost) 的大作中提到: 】 : 五家公司的试剂盒，对同一批血液样品进行测试，两家测出少量阳性，三家全部阴性。 : 显然，要溯源病毒源头，光靠抗体测试，还不够，假阳性假阴性都需要额外的参考标准。 : In order to evaluate the performance of the test kits, the ministry also : tested 500 blood donation samples collected from January to March in 2019 in : Japan's Kōshin'etsu region. Two out of the five firms showed positive : results, indicating that two people were found to be positive, which : accounted for 0.4 percent of the total. : http://news.cgtn.com/news/2020-05-15/-False-positive-of-COVID-19-possible-in-2019-blood-samples-in-Japan-Qwi3TQV0Zy/index.html
这两家不出所料应该是都是made in China 【 在 robertfrost (robertfrost) 的大作中提到: 】 : 五家公司的试剂盒，对同一批血液样品进行测试，两家测出少量阳性，三家全部阴性。 : 显然，要溯源病毒源头，光靠抗体测试，还不够，假阳性假阴性都需要额外的参考标准。 : In order to evaluate the performance of the test kits, the ministry also : tested 500 blood donation samples collected from January to March in 2019 in : Japan's Kōshin'etsu region. Two out of the five firms showed positive : results, indicating that two people were found to be positive, which : accounted for 0.4 percent of the total. : http://news.cgtn.com/news/2020-05-15/-False-positive-of-COVID-19-possible-in-2019-blood-samples-in-Japan-Qwi3TQV0Zy/index.html
五家公司的试剂盒，对同一批血液样品进行测试，两家测出少量阳性，三家全部阴性。显然，要溯源病毒源头，光靠抗体测试，还不够，假阳性假阴性都需要额外的参考标准。
In order to evaluate the performance of the test kits, the ministry also
tested 500 blood donation samples collected from January to March in 2019 in Japan's Kōshin'etsu region. Two out of the five firms showed positive
results, indicating that two people were found to be positive, which
accounted for 0.4 percent of the total.http://news.cgtn.com/news/2020-05-15/-False-positive-of-COVID-19-possible-in-2019-blood-samples-in-Japan-Qwi3TQV0Zy/index.html
抗体 问题是假阳性，核酸是加阴性，
【在 robertfrost(robertfrost)的大作中提到：】
：五家公司的试剂盒，对同一批血液样品进行测试，两家测出少量阳性，三家全部阴性。显然，要溯源病毒源头，光靠抗体测试，还不够，假阳性假阴性都需要额外的参考标准。
：In order to evaluate the performance of the test kits, the ministry also
这个要看抗体的具体技术参数，如果特异性有99%，就很好了，单侧个人的话，如果有
阳性，就是99%的信心。
不过，如果做群体测量，群体的真实感染度必须比较高才行，比如5% - 10%。 如果群
体的真正阳性率也才1%，那么用这个好的抗体也测不出什么可靠的结果。
【 在 robertfrost (robertfrost) 的大作中提到: 】
: 五家公司的试剂盒，对同一批血液样品进行测试，两家测出少量阳性，三家全部阴性。
: 显然，要溯源病毒源头，光靠抗体测试，还不够，假阳性假阴性都需要额外的参考标准。
: In order to evaluate the performance of the test kits, the ministry also
: tested 500 blood donation samples collected from January to March in 2019 in
: Japan's Kōshin'etsu region. Two out of the five firms showed positive
: results, indicating that two people were found to be positive, which
: accounted for 0.4 percent of the total.
: http://news.cgtn.com/news/2020-05-15/-False-positive-of-COVID-19-possible-in-2019-blood-samples-in-Japan-Qwi3TQV0Zy/index.html
这两家不出所料应该是都是made in China
【 在 robertfrost (robertfrost) 的大作中提到: 】
: 五家公司的试剂盒，对同一批血液样品进行测试，两家测出少量阳性，三家全部阴性。
: 显然，要溯源病毒源头，光靠抗体测试，还不够，假阳性假阴性都需要额外的参考标准。
: In order to evaluate the performance of the test kits, the ministry also
: tested 500 blood donation samples collected from January to March in 2019 in
: Japan's Kōshin'etsu region. Two out of the five firms showed positive
: results, indicating that two people were found to be positive, which
: accounted for 0.4 percent of the total.
: http://news.cgtn.com/news/2020-05-15/-False-positive-of-COVID-19-possible-in-2019-blood-samples-in-Japan-Qwi3TQV0Zy/index.html
那不叫 特异性，你说的是 阳性预测值 PP V，特异性是 true negative ！
【在 comeandgo(春困秋乏夏打盹)的大作中提到：】
：这个要看抗体的具体技术参数，如果特异性有99%，就很好了，单侧个人的话，如果有
：阳性，就是99%的信心。