The discovery of a new and potentially vaccine-resistant Covid variant has concerned governments and unnerved markets around the world. Omicron has prompted the return of border closures and mandatory testing and mask wearing as countries attempt to slow its spread.
The number of mutations on its spike protein – the part of the virus vaccines use to prime the immune system – has concerned scientists, but it will take weeks to determine the extent of the threat Omicron poses. The Guardian’s science correspondent Linda Geddes explains
- Omicron: everything you need to know about new Covid variant
- Despite reports of milder symptoms Omicron should not be underestimated
- Omicron: entry bans spread as China pledges 1bn jabs for Africa
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Source: The Guardian