英国政府最新(Jan 13)疫苗观察报告中的重点分析：疫苗防止有症状感染和住院的结果

谢谢下面的网友提供了一张图，让我找到了英国政府发布的最新的对疫苗的观察报告。

原文链接：

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1046431/Vaccine-surveillance-report-week-2-2022.pdf

里面数据丰富，值得认真浏览。下面网友的疫苗针对感染的图，也是出自这个系列的报告。

 

我找出的重点，主要针对Omicron。

对比Delta，几种疫苗对现在的Omicron防止有症状感染的结果：

The symptomatic disease，，，In all periods, effectiveness was lower for Omicron compared to Delta.

1）Among those who had received 2 doses of AstraZeneca, effectiveness dropped from 45 to 50% to almost no effect against Omicron from 20 weeks after the second dose.

2）Among those who had received 2 doses of Pfizer or Moderna effectiveness dropped from around 65 to 70% down to around 10% by 20 weeks after the 2nd dose. 

3）2 to 4 weeks after a booster dose vaccine effectiveness ranged from around 65 to 75%, dropping to 55 to 65% at 5 to 9 weeks and 45 to 50% from 10+ weeks after the booster.

 

疫苗对防止Omicron引起的住院的结果：

Results for hospitalisations，，， 

1）One dose of vaccine was associated with a 43% reduced risk of hospitalisation among symptomatic cases with the Omicron variant,

2）2 doses with a 55% reduction up to 24 weeks after the 2nd dose and a 40% reduced risk 25 or more weeks after the 2nd dose, and

3）a 3rd dose was associated with a 74% reduced risk of hospitalisation in the first 2-4 weeks after vaccination dropping slightly to a 66% reduction by 10+ weeks after the booster dose.