伦敦帝国理工关于Omicron再感染的文章，自然免疫对Omicron防再感染的有效率为19%。

还有，没有证据表明Omicron的严重程度低于Delta。

还需要更多的数据。

To put this into context, in the pre-Omicron era, the UK “SIREN” study of COVID infection in healthcare workers estimated that prior infection afforded 85% protection against a second COVID infection over 6 months. The reinfection risk estimated in the current study suggests this protection has  fallen to 19% (95%CI: 0-27%) against an Omicron infection.

The study finds no evidence of Omicron having lower severity than Delta, judged by either the proportion of people testing positive who report symptoms, or by the proportion of cases seeking hospital care after infection. However, hospitalisation data remains very limited at this time.

原文链接：https://www.imperial.ac.uk/news/232698/omicron-largely-evades-immunity-from-past/

 

来源: solo1 于 2021-12-28 17:35:52