楼主你这个情况肯定是阳性。 给你检测的PCR instrument probably primarily focused on the S gene and now there are way too many mutations on the S gene which caused the false negativity on the instrument.
PCR应该还是可以检测到阳性的,只是可能会误把BA.2看成是Delta而不是Omicron。 Further, scientists have found that BA.2 is harder to detect with PCR tests than BA.1. Although researchers were able to quickly differentiate BA.1 from the delta variant using a PCR test, the BA.2 subvariant does not possess the same "S gene target failure" seen in BA.1. As a result, BA.2 looks like the delta variant on the test, according to Wesley Long, a pathologist at Houston Methodist Hospital. "It's not that the test doesn't detect it; it's just that it doesn't look like omicron," Long said. "Don't get the impression that 'stealth omicron' means we can't detect it. All of our PCR tests can still detect it."
antigen test 很不准, 假阳和假阴都很多。 两次PCR 都是阴性应该不是covid.
隔壁质疑为什么冬奥运动员下飞机才变阳的来看看
我也很疑惑为什么这边要坚持捅鼻子,我感染的时候完全没有上呼吸道症状,就是喉咙很痛
我感觉是测试的手段问题 一是omicron可能不容易从鼻子里测出来,测出来要捅很深,这可能是为啥运动员下飞机测出来了,国内测都是捅很深。 我儿子前三次都捅的没那么深,他都没反应,最后测出阳性是鼻子捅了很深,他哇得一声哭了,我看着都心疼。
能不能区分flu当然看测试有没有测flu。Fast test只测COVID,不测flu,只有COVID才会阳性。PCR要看是单纯测COVID的,还是两种联合的测试,前者和fast test一样,只能给出COVID的结果,后者可以同时给出COVID和flu的结果。我猜你的意思是flu和COVID是不是有交叉活性,flu是不是也能让COVID的测试阳性,这是测试特异性的问题,应该没有问题的,起码 PCR是绝对不会混淆的,抗原测试要看两种抗原的相似度,flu和冠状病毒不是一类的,所以不应该有交叉活性。而且两种症状相似,测试设计的时候当然得挑COVID非常特有的片段或位点进行测试。
僵化吧,更新不及时,omicron才有这个特性,已经生产出的kit的instruction都已经印好了
你的症状虽然像,但flu 也可能,你测核酸时,没有顺带测flu ?
我更信核酸,
PCR应该还是可以检测到阳性的,只是可能会误把BA.2看成是Delta而不是Omicron。
Further, scientists have found that BA.2 is harder to detect with PCR tests than BA.1. Although researchers were able to quickly differentiate BA.1 from the delta variant using a PCR test, the BA.2 subvariant does not possess the same "S gene target failure" seen in BA.1. As a result, BA.2 looks like the delta variant on the test, according to Wesley Long, a pathologist at Houston Methodist Hospital. "It's not that the test doesn't detect it; it's just that it doesn't look like omicron," Long said. "Don't get the impression that 'stealth omicron' means we can't detect it. All of our PCR tests can still detect it."
iHealth 杭州产的
主要是爹妈被迫躲到公寓去了,大过年的想和我们一起。
每个人感染病毒浓度都不一样,试剂也是有检测限的,有些感染无症状的可能就是感染浓度太低,病毒复制不太多
我同事女儿去滑雪感染了,然后他们两口子一点也没事,在家戴好口罩应该没问题