A new mutation of the Delta variant of Covid-19 is expanding in England and is being monitored and assessed, according to official UK health data reported on Tuesday.
AY.4.2, which is being dubbed as "Delta Plus" in some quarters, contains mutations that might give the coronavirus which causes Covid-19 greater survival advantage. The “sublineage" is increasing in frequency but experts do not believe it is responsible for the continued high number of daily coronavirus infections in the country, which hit 49,156 cases on Monday – the highest figure since July.