Omicron subvariant makes up nearly one quarter of new Covid cases in US

The BA.2 sub-lineage of the Omicron variant now makes up nearly a quarter of new Covid-19 infections in the US, according to the latest data of the US Centers for Disease Control and Prevention (CDC).

This data is up from around 1 in 10 new cases just a week prior, Xinhua news agency reported.

The BA.2 variant is spreading fast in the country, with infections nearly doubling every week, according to CDC data.

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Early studies showed that BA.2 may be up to 30 per cent more transmissible than the original Omicron.