Omicron subvariant BA.2 is now the dominant strain of Covid-19 in the US, CDC says

The hardest hit region continues to be the Northeast, where BA.2 is causing more than 70% of all cases. The South and Mountain West are seeing the fewest cases in the US. BA.2 is causing slightly more than one-third of infections in those regions.

This is a developing story and will be updated.

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