anzbank 发表于 2022-2-17 08:58
儿童医院已经院内传染
bintoo 发表于 2022-2-16 21:53
现在已经无可避免和改变,小朋友肯定都得轮商。只要学校继续开又让上,那肯定继续送。 ...
5 MIN READ
Social media users have misinterpreted a British government report on COVID-19 vaccines, baselessly claiming that it proves vaccinations permanently lower an individual’s immunity to the disease.
The assertion rests on observations by the UK Health Security Agency that double-vaccinated people who later catch COVID-19 develop less ‘N antibodies’ than those who recover from the illness before their inoculations. (see page 23, here).
On Facebook, Twitter and one journalist’s blog, multiple people have since interpreted this finding to mean double-vaccinated individuals have less immunity overall to COVID-19 here, here, here and here).
“The British government has spilled the beans about that fact that once you get double jabbed, you will never again be able to acquire full natural immunity,” said one Facebook user, who added that vaccinated people would be “far more vulnerable” to future SARS-CoV-2 mutations.
The user added: “The unvaccinated, meanwhile, will procure lasting, if not permanent, immunity to all strains of the alleged virus after being infected with it naturally even just once.”
These assumptions are misguided, several medical experts have told Reuters.
"Although natural immunity gives broader protection against the virus, it’s not necessarily better,” said Professor Tim Spector, head of genetic epidemiology at King’s College London and lead scientist on the ZOE COVID Study app, one of the world’s largest ongoing studies of COVID-19 (covid.joinzoe.com/about).
He explained that there are different types of antibodies that offer protection, none of which guarantees more or less immunity, with reinfection possible both after vaccination and natural infection.
“Anti-N antibodies are only produced if you’ve actually been infected with COVID-19 (natural infection). Anti-N antibodies recognise a molecule inside the SARS-CoV-2 virus called the nucleocapsid (N),” Spector said.
“Whereas, Anti-S antibodies look for the spike protein (S) on the surface of the virus; these antibodies can be present after both a natural infection and a vaccine. This is because COVID vaccines are based on the spike protein.”
Pointing Reuters to Zoe COVID study research, Spector added that anti-N antibodies are not guaranteed to develop in everyone who recovers naturally from COVID-19 (here).
“Our latest analysis found that one in five ZOE Study participants who tested positive for COVID didn’t go on to have detectable anti-N antibodies afterwards,” he said.
Experts at Meedan Health Desk, a group of public health scientists working to tackle medical misinformation, affirmed Spector’s comments.
“Importantly, the anti-S and anti-N antibodies combined do not equal greater immunity against COVID-19,” they told Reuters in an email.
The experts added that early “viral neutralisation” through vaccination might modify the body’s response and limit the subsequent development of anti-N antibodies if infected after vaccination. However, this would not impact levels of immunity.
There are still many unknowns about immunity and COVID-19 variants. More research is being conducted to study protection from COVID-19 vaccines compared to prior infection.
Meedan Health Desk experts pointed Reuters to one recent study analysing hospitalised individuals who received a COVID-19 vaccine and those who had been infected with COVID-19 (here). They said it showed vaccine immunity was “more protective than ‘natural’ infection against COVID-19".
COVID-19 mRNA vaccines are also “about five times more effective” at preventing hospitalisation than a previous infection, they added.
Meanwhile, Zoe COVID Study data (here) suggests two doses of the AstraZeneca vaccine give 71% protection against infection, while two doses of the Pfizer vaccine give 87% protection.
By contrast, it suggests an unvaccinated person with a previous COVID infection has 65% protection against reinfection.
VERDICTMisleading. While the UKHSA has observed lower anti-N antibodies in people who caught COVID-19 after double vaccination, this does not mean vaccines have hindered natural immunity to the disease.
This article was produced by the Reuters Fact Check team. Read more about our fact-checking work here .
Our Standards: The Thomson Reuters Trust Principles.
bintoo 发表于 2022-2-17 14:11
Fact Check-Lower number of anti-N antibodies does not indicate lower immunity, say medical experts
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pkill 发表于 2022-2-17 13:54
可能刚好相反,打了疫苗有的人就不会产生自然抗体了...https://assets.publishing.service.gov.uk/governm ...
franklehuang 发表于 2022-2-17 15:59
英国针对疫苗副作用的专业论证文章越来越多,使公众明白是迟早的事,年底许多真实情况都会陆续明朗化。
...
ericego 发表于 2022-2-18 19:06
临床试验的第一期就是试验安全性的,第二期是有效性,第三期是广泛的试验同时考察安全性和有效性。这种能 ...
LLVV 发表于 2022-2-19 13:21
1901~~~~今天
雪2003 发表于 2022-2-18 21:16
父母有能力在家办公就不要让小孩去学校了 躲过这波高峰在看
雪2003 发表于 2022-2-20 10:39
所以最后倒霉的还是韭菜 就是这个国家的中产 口停手就停 领福利的和富人不害怕 ...
新马甸甸 发表于 2022-2-20 15:19
Glenn Innes的high school停课转网课了,不知道会不会有更多的学校停下来
N杨国涛Z 发表于 2022-2-20 14:48
疫情高峰,为什么学校还要开放?为什么没有人组织抗议,要学校转为网课呢? ...
傑少 发表于 2022-2-20 19:54
大家不带孩子去学校都用些什么理由不去啊?直接说怕学位都没了,现在这情况也不知道要到什么时候 ...
ericego 发表于 2022-2-18 19:06
临床试验的第一期就是试验安全性的,第二期是有效性,第三期是广泛的试验同时考察安全性和有效性。这种能 ...
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