Some evidence suggests AY.4.2 may be slightly more transmissible than Delta, but experts aren't sure yet. Studying Delta's mutations could be a step toward variant-specific treatments. A new version ...

UNDATED (AP) - What is the "delta plus" variant? It's a relative of the delta variant, identified by British scientists last month. READ CBS NEWS:Labs in California, Florida, Maryland, Massachusetts, ...

Kamil Khafizov noted that the emergence of a new variant was likely to aggravate the epidemiological situation in the country MOSCOW, October 21. / TASS /. Russia registered some isolated cases of the ...