Russia Reports Cases Of More Contagious COVID-19 Delta Subvariant

The AY.4.2 variant of coronavirus is also on an increasing trajectory in England.

Russia has reported "isolated cases" of COVID-19 with a subvariant of the Delta variant that is believed to be even more contagious, the state consumer watchdog's senior researcher said on Thursday.

The researcher, Kamil Khafizov, said the AY.4.2 subvariant may be around 10% more infectious than the original Delta - which has driven new cases and deaths to a series of record daily highs in Russia - and could ultimately replace it.

However, he said this was likely to be a slow process.

"The vaccines are effective enough against this version of the virus, which is not so different as to dramatically change the ability to bind to antibodies," he said.