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Explainer: How worried should we be about the Omicron variant?

Test tubes labelled "Covid-19 test positive" are seen in front of displayed words "OMICRON SARS-COV-2" in this illustration. [Reuters]

The Omicron coronavirus variant has been detected in 77 countries since it was first identified three weeks ago, fueling concerns that its large number of mutations will help it spread faster and evade protection provided by COVID-19 vaccines or prior infection. read more

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