World
Covid: Strengthening the ‘key’ against the risk of Omicron re-infection
![How do you say 'Omicron'?](https://news7g.com/wp-content/uploads/2021/12/121930345_p0b7smnn-780x470.jpg)
A virologist says there is evidence Omicron can re-infect people who have had Covid.
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A virologist says there is evidence Omicron can re-infect people who have had Covid.
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