Covid-19 news: Omicron's reinfection risk 10 times higher than delta's
A regular round-up of the latest coronavirus news, plus insight, features and interviews from New Scientist about the covid-19 pandemic
Health 31 March 2022Latest coronavirus news as of 1pm 31 March
In the UK, the risk of being reinfected with SARS-CoV-2 virus is 10 times higher with omicron than delta
The Office for National Statistics’ (ONS) Covid-19 Infection Survey estimates the number of reinfections that occurred in the UK between July 2020 and 20 March 2022.
From 20 December 2021 to 20 March 2022, when omicron was the dominant variant, the risk of reinfection was about 10 times greater than when delta dominated, defined as mid-May 2021 to 19 December.
Reinfection definitions vary. The ONS defines it as a positive PCR test result after a number of negative results, following an initial infection. The specific number of negative results required between infections depends on when the reinfection occurred, as definitions have changed over time.
Covid-19 immunity, whether naturally acquired or via vaccines, wanes over time, leaving people more vulnerable to reinfection. Omicron has also evolved to better evade immunity.
“Risk of reinfection from omicron is much higher than any other previous variant, with those unvaccinated more likely to be reinfected than those vaccinated,” Sarah Crofts from the ONS said in a statement.
Other coronavirus news
The World Health Organization (WHO) expects covid-19 to become less severe over time. A WHO report sets out how countries should react to a worst-case, best-case and intermediate-case scenario for the pandemic. In the best-case scenario, less severe variants will emerge and booster vaccines will be unnecessary. In the worst-case scenario, a more harmful variant will evolve and immunity will wane.
“Based on what we know now, the most likely scenario is that the COVID-19 virus continues to evolve, but the severity of disease it causes reduces over time as immunity increases due to vaccination and infection,” Tedros Adhanom Ghebreyesus, WHO’s director-general, said at a press briefing on 30 March.
The emergence of the less severe omicron variant made many people optimistic that SARS-CoV-2 was evolving to be more transmissible, but less dangerous. This does not always occur in a virus’ evolution, however.
Vaccinating 5- to 11-year-olds reduces their risk of being hospitalised with omicron by 68 per cent. In the US, Pfizer/BioNTech vaccines have been available for this age group since October 2021, despite young children being at very low risk of severe covid-19. A nationwide study of 1185 children has now found two Pfizer/BioNTech doses considerably cut their risk of being hospitalised while omicron was circulating. The UK recently started offering 5- to 11-year-olds a vaccine, but the potential heart risks of immunising children are unclear.
https://www.newscientist.com/article/2237475-covid-19-news-omicrons-reinfection-risk-10-times-higher-than-deltas/
まあ欧米のＭＳＭにおいてＯＡＳは禁句なのでオミクロンは再感染しやすいとか言って誤魔化すしかないわけでしょうけど、何時かは無慈悲な真実と向き合って抗原原罪に対する対策を始めないとあかんのとちゃいますかねえ・・・（爆ｗｗｗｗｗｗｗｗｗ
SARS-CoV-2 was evolving to be more transmissible, but less dangerous. This does not always occur in a virus’ evolution, however.
Why are so many people in England getting reinfected with Covid?
Waning immunity, easing of restrictions and more transmissible variants are all to blame, experts say
With Covid infection levels at a record high in parts of the UK, the virus is rife once more, with experts noting that one factor is the rise of a variant of Omicron known as BA.2. But what does this mean for reinfections?
Can you get Covid more than once?
Yes. According to the latest weekly Influenza and Covid-19 surveillance report from the UK Health Security Agency (UKHSA), since the beginning of the pandemic to 20 March this year 804,463 possible reinfection episodes have been identified in England – defined as two positive tests more than 90 days apart – with 50,866 of those identified in figures for the most recent week. The agency adds that, so far, 8,717 third episodes and 74 fourth episodes have been identified since the start of the pandemic.
However, as not everyone with Covid takes a test, the figures are likely to be an undercount.
The UKHSA data also shows that while reinfections did occur at low levels earlier in the pandemic, the rate of reinfection shot up towards the end of 2021, before falling and, more recently, rising once more.
Why have reinfections become more common?
While a Covid infection will offer some protection against catching the virus again, this protection wanes over time. Data also suggests reinfection is higher in unvaccinated people, while the severity of the previous infection, and the level of immune response, may also play a role in the risk of reinfection.
In addition, the more people who have had Covid, the greater the pool of individuals that could potentially be reinfected, and with infection levels high – and restrictions now eased – the chance of a susceptible person being exposed to Covid is raised.
What’s more, the body’s immunity – whether from past infection or vaccination – may hold up better against some variants than others.
These factors became particularly evident when Omicron reached the UK towards the end of 2021, with the variant being both highly transmissible and able to dodge the body’s immune responses to other variants or vaccination to a significant degree.
“Reinfections are currently rapid and frequent, far more than previous waves,” said Prof Danny Altmann, an immunologist at Imperial College London. “Partly [because of] the simple trilogy of transmissible variant, immune waning, [and] fewer precautions.”
How likely are you to get BA.2 if you have had the original Omicron variant?
BA.2 is a variant of Omicron, with UKHSA data suggesting it is even more transmissible than the original, BA.1 – although the risk of hospitalisation appears to be no greater. BA.2 is currently the most common Covid variant across the UK.
Altmann said BA.2 does not seem to show differences compared with BA.1 in its ability to evade the body’s immune responses. The point is highlighted by research from the US, with the authors noting the rise of BA.2 following the surge of BA.1 “is probably related to increased transmissibility rather than to enhanced immunologic escape”.
While UKHSA data, as well as preliminary research from Denmark, suggests infection with BA.2 shortly after an infection with BA.1 is possible, it seems it is – at least for now – very rare, with the Danish research finding such reinfections were mostly in young, unvaccinated individuals.
But both BA.1 and BA.2 are relatively new – and it takes time for reinfections to occur.
“We are at the start of the 90-day period for possible reinfection with BA.2 following a BA.1 infection and there is a need for ongoing surveillance but there are no early indications of a specific reinfection issue with this scenario,” notes the latest UKHSA technical briefing on Covid variants.
However Altmann, drawing on his own research, sounded a note of caution.
“The surprising aspect is that even, say, compared to expectations from common colds, Omicron seems so poorly immunogenic that it doesn’t even stimulate good immunity to itself – something that should be noted by all those thinking they may as well go out and get infected as a ‘natural booster’,” he said.
https://www.theguardian.com/world/2022/mar/31/why-are-so-many-people-in-england-getting-reinfected-with-covid-omicron
まあそう簡単に「贄」に死なれちゃせっかくの大規模魔術「クリエイト・ナチュラル・ワクチン」の効果が低下して、本来は時間と共にどんどん性能がアップするはずのナチュラル・ワクチンの進化が妨げられてしまうのでバタバタと死ぬって事はないようにDeath汁は設計されてると思われ。（爆ｗｗｗｗｗｗｗ
現時点では単に抗原原罪により全てのコロナウイルスに対して免疫システムが対武漢株抗体を大量に作り出してしまうというエラーが発生してるだけ。
まだＡＤＥとかＶＡＩＤＳを発症してるのはごく少数だと思われ。
そしてブースター接種を続ければＶＩＩＤＳの発生が先延ばしできるのでＡＤＥとかＶＡＩＤＳの発症をも先延ばしできるのではないかと。
まあ勿論それなりのMPとHPの消費という対価は避けられませんが、免疫システムのバランスが一気に崩れて★になるリスクを考慮すると やっぱ接種者にとってはブースター接種は必須かな？（爆ｗｗｗｗｗｗｗｗｗｗｗ
ただ毎回毎回、大量の武漢株抗体の発生が身体にどういう影響を起こすかはこれからのお楽しみですな。
それとＯＡＳによる月一ぐらいのペースでの定期的コロナ再感染。（爆ｗｗｗｗｗｗｗｗｗ
もしかしたら選ばれた一握りの勇者は奇跡的に最強のスーパー免疫とやらがゲットできるかもしれないので今後も追加ブースター接種レッツトライ！
「Ｓａｖｅ Ｌｉｖｅｓ！」
2021/10/26 — 2021/09/23 — 2021年9月21日火曜日. mRNAワクチン接種由来の抗原原罪（こうげんげんざい original antigenic sin）が既に発生してる.
、、、（爆ｗｗｗｗｗｗｗｗ
5 件のコメント:
> そしてブースター接種を続ければＶＩＩＤＳの発生が先延ばしできるのでＡＤＥとかＶＡＩＤＳの発症をも先延ばしできるのではないかと。
同じワクチン5回打ったら死亡率激増とか言ってたのはいつの話だったんすかねｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗ
コロナ以外の病気に感染しまくりで病弱人が激増するはずですしｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗ
ブースターというよりPoop(ウンコワクチン()接種)->Star(お星さまｗｗｗ)じゃないっすかｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗｗ
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> ツイートする人が激減したらツイッターは倒産なんじゃないですかねｗ
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