奥密克戎变异毒株危险性 Covid-19: How dangerous is Omicron? | The Economist

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近期,南非等国报告新冠病毒变异毒株奥密克戎,全球多地陆续发现感染或疑似病例,引发高度关注。那么它的危险性究竟有多强?和之前德尔塔毒株又有什么不同呢?听专家来一一解答。

The world is on edge as Omicron, the new variant of Covid-19 spreads around the world.

Britain, Germany and Italy announced their first Omicron cases.

Countries are scrambling to contain transmission.

Researchers say it could be the most infectious form of the virus so far.

What does the new strain mean for the global fight against Covid-19?

Our experts answer your questions.

Why has it been designated as a "variant of concern"?

Omicron has been designated as a "variant of concern" because of the large number of mutations to its spike protein.

It has more mutations than any other variant that has been observed so far by genomic surveillance, and a large number of those mutations are on sites of the spike protein which are known as the binding domain, which is the bit of the spike that binds to your cells and they're also the bit of the spike on which antibodiesthe parts of your immune system which protect you from infectionbind in order to prevent that from happening.

So lots of mutations on sites where antibodies are being created is of concern.

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