A new Covid variant is said to account for nearly a quarter of cases of the virus in England.
It is a sub-lineage of the Omicron variant known as Orthrus or CH.1.1. and was first detected in November last year, according to surveillance data.
A new Covid variant is said to account for nearly a quarter of cases of the virus in England.
It is a sub-lineage of the Omicron variant known as Orthrus or CH.1.1. and was first detected in November last year, according to surveillance data.