You are using an older browser version. Please use a supported version for the best MSN experience.

What’s known about the omicron variant

The World Health Organization has declared a new variant of concern called omicron, first identified in South Africa. Scientists say there are a large number of mutations in the omicron variant, which means it could be more infectious and cause more severe illness.

UP NEXT

UP NEXT

AdChoices
image beaconimage beaconimage beacon