你们身边应该很少碰到比我更关注疫情的人。我这三年在朋友圈发了超过200条和疫情相关的信息。因此也有不少人会主动和我讨论疫情相关的信息。今天早上大学同学给我发了这条链接，让我点评。

https://www.who.int/news/item/27-10-2022-tag-ve-statement-on-omicron-sublineages-bq.1-and-xbb

我先把WHO的summary贴出来

The Omicron variant of concern remains the dominant variant circulating globally, accounting for nearly all sequences reported to GISAID[1]. While we are looking at a vast genetic diversity of Omicron sublineages, they currently display similar clinical outcomes, but with differences in immune escape potential.

The potential impact of these variants is strongly influenced by the regional immune landscape. While reinfections have become an increasingly higher proportion of all infections, this is primarily seen in the background of non-Omicron primary infections. With waning immune response from initial waves of Omicron infection, and further evolution of Omicron variants, it is likely that reinfections may rise further.

WHO认为BQ.1和XBB的临床表现和之前的OMICRON毒株接近，但是在免疫逃逸方面有所不同。
这两个毒株所带来的影响，和当地的免疫状况有很大的相关性。虽然重复感染在所有感染中所占的比例在升高，但是重复感染主要针对初次感染为非奥密克戎毒株导致的情形。

不过，随着奥密克戎感染导致的免疫反应下降，以及奥密克戎的进一步进化，重复感染可能会进一步上升。

再摘取一段对XBB毒株的陈述

While further studies are needed, the current data do not suggest there are substantial differences in disease severity for XBB* infections. There is, however, early evidence pointing at a higher reinfection risk, as compared to other circulating Omicron sublineages. Cases of reinfection were primarily limited to those with initial infection in the pre-Omicron period. As of now, there are no data to support escape from recent immune responses induced by other Omicron lineages.虽然需要更多的证据支持，但是目前的数据并不说明由XBB导致的症状更严重。不过，早期的证据说明，和其他正在流行的奥密克戎毒株相比，XBB有更高的重复感染率。重复感染主要出现在初次感染是非奥密克戎毒株的情况下。就目前来说，没有数据支持出现了XBB对其他奥密克戎毒株导致的免疫反应的逃逸。
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FROM 183.237.89.*