假如是接触到了流感病毒，当然有可能测出来是阳性。 举个例子，polio灭活疫苗，假如从口入接触了polio病毒，粪便里会有活病毒，人没症状。 再举个例子，百日咳和白喉也是灭活疫苗，假如感染了这两种病菌，咽拭子也会是阳性，人没症状。 以上两个例子，有文献证明，懂行的都知道。 所以新冠灭活疫苗，我不知道mRNA疫苗是如何，但是假如就是传统的灭活疫苗，完全有可能人没症状但是咽拭子阳性。 直接摘抄CDC网站吧，关于百日咳疫苗： Q: Doesn’t herd immunity protect most people? A: When enough of a population is immune to an infectious disease, through vaccination or prior illness, its spread from person to person is unlikely. Public health experts call this ‘herd immunity’ (or community immunity). Even people not vaccinated (such as newborns and those with chronic illnesses) typically have protection because the disease has little opportunity to spread within their community. Public health experts cannot rely on herd immunity to protect people from pertussis since: Pertussis spreads so easily Vaccine protection decreases over time Acellular pertussis vaccines may not prevent colonization (carrying the bacteria in your body without getting sick) or spread of the bacteria 看到没，打了疫苗，产生抗体，不发病，但是会成为无症状单菌者！
假如是接触到了流感病毒，当然有可能测出来是阳性。 举个例子，polio灭活疫苗，假如从口入接触了polio病毒，粪便里会有活病毒，人没症状。 再举个例子，百日咳和白喉也是灭活疫苗，假如感染了这两种病菌，咽拭子也会是阳性，人没症状。 以上两个例子，有文献证明，懂行的都知道。 所以新冠灭活疫苗，我不知道mRNA疫苗是如何，但是假如就是传统的灭活疫苗，完全有可能人没症状但是咽拭子阳性。 直接摘抄CDC网站吧，关于百日咳疫苗： Q: Doesn’t herd immunity protect most people? A: When enough of a population is immune to an infectious disease, through vaccination or prior illness, its spread from person to person is unlikely. Public health experts call this ‘herd immunity’ (or community immunity). Even people not vaccinated (such as newborns and those with chronic illnesses) typically have protection because the disease has little opportunity to spread within their community. Public health experts cannot rely on herd immunity to protect people from pertussis since: Pertussis spreads so easily Vaccine protection decreases over time Acellular pertussis vaccines may not prevent colonization (carrying the bacteria in your body without getting sick) or spread of the bacteria 看到没，打了疫苗，产生抗体，不发病，但是会成为无症状单菌者！
CDC website 自己说的啊，打过卡介苗皮试很多就是会positive啊。 https://www.cdc.gov/tb/topic/populations/tbinasians/default.htmTesting and DiagnosisMany people born outside of the United States have been given a vaccine called BCG. Vaccination with BCG may cause a false positive reaction to a TB skin test. A positive reaction to a TB skin test may be due to the BCG vaccine itself or due to infection with TB bacteria. TB blood tests are not affected by prior BCG vaccination and are not expected to give a false-positive result in people who have received BCG. TB blood tests are the preferred method of TB testing for people who have received the BCG vaccine.
CDC website 自己说的啊，打过卡介苗皮试很多就是会positive啊。 https://www.cdc.gov/tb/topic/populations/tbinasians/default.htmTesting and DiagnosisMany people born outside of the United States have been given a vaccine called BCG. Vaccination with BCG may cause a false positive reaction to a TB skin test. A positive reaction to a TB skin test may be due to the BCG vaccine itself or due to infection with TB bacteria. TB blood tests are not affected by prior BCG vaccination and are not expected to give a false-positive result in people who have received BCG. TB blood tests are the preferred method of TB testing for people who have received the BCG vaccine.
CDC website 自己说的啊，打过卡介苗皮试很多就是会positive啊。 https://www.cdc.gov/tb/topic/populations/tbinasians/default.htmTesting and DiagnosisMany people born outside of the United States have been given a vaccine called BCG. Vaccination with BCG may cause a false positive reaction to a TB skin test. A positive reaction to a TB skin test may be due to the BCG vaccine itself or due to infection with TB bacteria. TB blood tests are not affected by prior BCG vaccination and are not expected to give a false-positive result in people who have received BCG. TB blood tests are the preferred method of TB testing for people who have received the BCG vaccine.
你说这话有证据和数据吗？
真的是，我是在反驳那个帖子。你打过流感疫苗，感染病毒咽拭子才会阳性。问题是，这些劳工哪里感染的新冠病毒呢？
那么问题来了，为什么津巴布韦要查抗体呢？应该查得是核酸啊。难道是参加了疫苗三期试验？
。。。。。。。。
US的疫苗美国人自己都信不过。你刚来美国的吧？
zan
病毒检测包括核酸检测和抗体检测，文中并没有提到用的是哪种检测方法。如果是抗体检测，打过疫苗后就应该是阳性结果。
这让人想起历史上种人痘防天花的故事。结果因为很不安全被淘汰了。
应该是核酸检测。
如果是抗体检测，非洲人没有必要统计中国人得过没有。
楼主的截图里不是有吗，France24，啥叫哪里看来的地摊新闻。。。。。究竟是谁没文化？啥叫每种都在同步进行？都确定有效安全？还是都还在确定过程中？
用RNA是最新的技术主要是缩短研发时间，用灭活/低活病毒是传统方法但研发时间长。核酸检测都是检测的核酸片段，要是疫苗刚打是有可能检测阳性的。所以报道中用的也只是“May“而已。
而且你们这帮人真心在美国吗？我们每个人刚来美国的时候学校都要做肺结核测试，几乎所有中国学生都会测试阳性（因为都打过疫苗），然后要去照X-Ray证明没肺结核。
BTW，人家说的是staff，这里就说是劳工，真是不放弃任何贬低中国人的机会啊。。。
我只能 哈哈哈
polio就有著名的cutter incident。。。用了灭活的菌株但是没有灭活成功，然后感染了一大堆人。
请问你的结论"几乎所有中国学生都会测试阳性"是怎么得到的？？？
我身边认识的没有一个在美国测是阳性的！
LOL
廊美是一个不同的美国
什么叫应该是。我仔细看过原文了，你看过了吗？不说别的，核酸检测需要RT-PCR，抗体检测要容易的多。
转绿卡的要做TB的体检，有两种检验方式，有一种大部分中国人会是阳性。所以做绿卡体检的时候你要告诉你的医生，你中国来的，有打过疫苗，医生会让你做另外一种血检，除非是真的得了肺结核，那就不会是阳性。所以就看你医生让你做哪种血检了。
https://cn.theaustralian.com.au/2020/08/20/43672/
只是预警，没有检测。造谣不要成本的吗？
完全暴露了你的无知
帽子扣得好响
re，需要看具体的检测方式。单看这个新闻没办法下判断的。
我看了好几个人都说美国不用灭活或者减活的病毒做疫苗，而是用的别的办法。但是我清楚的查到美国的大部分疫苗也是同样的原理。。。你们反共已经反到都无视科学原理了。。。佩服佩服
减活病毒一般robust, 不需要boost啥的
减活疫苗的问题是只是减活，不是完全死了，对有些人不能用，比如免疫力低下的人，孕妇（活的病毒可能致畸）
减活疫苗的罕见灾难是减活的病毒又变易成原生病毒
说什么美国不用减活疫苗是无知，mmr 就是减活的，流感也有减活的疫苗(喷鼻子的那种）
华人里都被这些小学生水平的反中狂人占领了。 他们根本没有那个水平读懂原文。
流感疫苗怎么会是灭活疫苗，灭活疫苗不容易大规模生产。流感疫苗是转基因生产出来的。
你根本就不懂免疫的原理。你的想法还是种人痘的想法。历史上第一个疫苗是牛痘疫苗，并不是把天花病毒注射到人体。
是打了疫苗呈阳性，还是本来就被感染了？
所有就是进中国要求各种检查，送出国的啥都不查。
胡扯蛋，不懂装懂，上面一个贴说得对，抗体阳性，抗原阴性，才能正常！
"外劳“? 看看这个帖子，就知道多少台湾的1450，大陆可没有这种说法
可惜不能踩你！
流感即使是灭活疫苗，但是流感可能的后果没有那么严重，能比吗？洗什么地？
怎么不查？查你有没有种疫苗
搞灭活不一定要最早的毒株 特征点有就可以
灭活不彻底就跟直接打病毒是一样的
检测抗体有什么用？这个只有科学统计和个人想知道自己是否得过新冠的时候才会检测
洗你这种没脑子的底啊。。。
我说的是有人帖子里“西方的都不用灭活病毒去搞疫苗”这种胡说八道，你是理解能力不足，还是脑子想不明白？洗你个头啊，。。。
中国已经有疫苗了？牛啊
CDC website 自己说的啊，打过卡介苗皮试很多就是会positive啊。
https://www.cdc.gov/tb/topic/populations/tbinasians/default.htm Testing and DiagnosisMany people born outside of the United States have been given a vaccine called BCG. Vaccination with BCG may cause a false positive reaction to a TB skin test. A positive reaction to a TB skin test may be due to the BCG vaccine itself or due to infection with TB bacteria. TB blood tests are not affected by prior BCG vaccination and are not expected to give a false-positive result in people who have received BCG. TB blood tests are the preferred method of TB testing for people who have received the BCG vaccine.
你把may理解成很多？
这个说的TB皮试，测得是non specific的hypersensitivity 反应，另一个是测血液里T cell对TB抗原的反应。。。。。都不是测active infection。。。。测血的那个specificity也没有那么高，跟某些mycobactria spp cross react， 这个两个是用来evaluate latent TB active TB是分子检测加culture的。。。
确实这种情况很普遍。当年刚过来的时候一起的中国学生TB skin test大多阳性，都不记得有没有不是阳性的。小伙伴们都很紧张，结果医生说，别紧张，你们中国过来的都打过疫苗。