Pfizer and BioNTech is among the vaccine manufacturers insisting they'll be able to quickly adapt their jabs within 100 days if the Omicron variant spreads.

Data suggests the new strain - first identified in South Africa - brings an increased risk of reinfection.

The World Health Organistation's calling it a "variant of concern".

But Jonathan Ball - a professor of molecular virology - says we shouldn't get ourselves into a "frenzy" just yet.

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