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Wales Online
Wales Online
National
Georgia Lambert & Daniel Smith

Scientists think they now know where Omicron variant of Covid came from

The dominant Omicron Covid variant is "most likely" to have come from mice, new research reveals.

Scientists now believe that it developed in mid-2020 in mice before reinfecting humans.

Back in November, the World Health Organisation (WHO) named the SARS-CoV-2 variant B.1.1.529, Omicron, as the fifth wave of concern since the start of the pandemic.

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