CNN
The BA.2 virus — a subvariant of the Omicron coronavirus variant — isn’t just spreading faster than its distant cousin, it may also cause more severe disease and appears capable of thwarting some of the key weapons we have against Covid-19, new research suggests.
New lab experiments from Japan show that BA.2 may have features that make it as capable of causing serious illness as older variants of Covid-19, including Delta.
And like Omicron, it appears to largely escape the immunity created by vaccines. A booster shot restores protection, making illness after infection about 74% less likely.
BA.2 is also resistant to some treatments, including sotrovimab, the monoclonal antibody that’s currently being used against Omicron.
The findings were posted Wednesday as a preprint study on the bioRxiv server, before peer review. Normally, before a study is published in medical journal, it is scrutinized by independent experts. Preprints allow research to be shared more quickly, but they are posted before that additional layer of review.
“It might be, from a human’s perspective, a worse virus than BA.1 and might be able to transmit better and cause worse disease,” says Dr. Daniel Rhoads, section head of microbiology at the Cleveland Clinic in Ohio. Rhoads reviewed the study but was not involved in the research…
