2022年10月30日日曜日

オックスフォード大学『新型コロナワクチンは接種後約80日以降は逆に重症化と死亡を促進させる』との非常に不都合な1290万人対象の調査結果を公表

 

2022年10月26日水曜日

英国 子供にとってワクチン接種による抗体レベルの上昇は百害あって一利なしとの非常に不都合な研究結果

https://tokumei10.blogspot.com/2022/10/blog-post_42.html

Waning of first- and second-dose ChAdOx1 and BNT162b2 COVID-19 vaccinations: a pooled target trial study of 12.9 million individuals in England, Northern Ireland, Scotland and Wales

International Journal of Epidemiology, dyac199, https://doi.org/10.1093/ije/dyac199
Published:
22 October 2022

Background

Several SARS-CoV-2 vaccines have been shown to provide protection against COVID-19 hospitalization and death. However, some evidence suggests that notable waning in effectiveness against these outcomes occurs within months of vaccination. We undertook a pooled analysis across the four nations of the UK to investigate waning in vaccine effectiveness (VE) and relative vaccine effectiveness (rVE) against severe COVID-19 outcomes.

Methods

We carried out a target trial design for first/second doses of ChAdOx1(Oxford–AstraZeneca) and BNT162b2 (Pfizer–BioNTech) with a composite outcome of COVID-19 hospitalization or death over the period 8 December 2020 to 30 June 2021. Exposure groups were matched by age, local authority area and propensity for vaccination. We pooled event counts across the four UK nations.

Results

For Doses 1 and 2 of ChAdOx1 and Dose 1 of BNT162b2, VE/rVE reached zero by approximately Days 60–80 and then went negative. By Day 70, VE/rVE was –25% (95% CI: –80 to 14) and 10% (95% CI: –32 to 39) for Doses 1 and 2 of ChAdOx1, respectively, and 42% (95% CI: 9 to 64) and 53% (95% CI: 26 to 70) for Doses 1 and 2 of BNT162b2, respectively. rVE for Dose 2 of BNT162b2 remained above zero throughout and reached 46% (95% CI: 13 to 67) after 98 days of follow-up.

Conclusions

We found strong evidence of waning in VE/rVE for Doses 1 and 2 of ChAdOx1, as well as Dose 1 of BNT162b2. This evidence may be used to inform policies on timings of additional doses of vaccine.

https://academic.oup.com/ije/advance-article/doi/10.1093/ije/dyac199/6770060


→ This evidence may be used to inform policies on timings of additional doses of vaccine.


Oxford Study Finds Negative Vaccine Effectiveness Against Covid Hospitalisation and Death

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