The new AY.4.2 strain of Covid-19 now makes up almost 10% of delta variant sequenced positive tests in England

100%

75

All other delta variants

50

AY.4.2

25

0

26 Jun

31 Jul

4 Sep

9 Oct

100%

75

All other delta variants

50

AY.4.2

25

0

26 Jun

31 Jul

4 Sep

9 Oct