BA.2 is now more prevalent than Delta, data shows

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A version of Omicron that is harder to track is rising quickly in England and is now more common than Delta.

Just a few hundred cases of BA.2 have been ever detected in the country so far but the number of people testing positive for the subvariant has quadrupled in the last week.  

Data from the UK’s largest Covid surveillance lab shows BA.2 was behind 0.8 per cent of all positive samples in the seven days to January 15 — up from 0.2 per cent the week prior.   

The once dominant Delta variant, for comparison, made up just 0.5 per cent of cases last week.

Delta was almost entirely pushed out following the arrival of the ultra-virulent original Omicron variant in late November, which accounts for the vast majority of domestic cases now. 

Scientists believe BA.2 may have evolved to be slightly more transmissible than Omicron and could slowly become the UK’s dominant Covid virus.

There are already signs BA.2 outstripping its ancestor strain in Denmark, where it now makes…