2023年1月6日 · Lab studies suggest that the bivalent vaccine is still effective in protecting against severe disease, though perhaps not as much against infection. XBB.1.5 is derived from the omicron variant BA.2, and while the current bivalent vaccine was developed for the BA.5 variant, it has been shown to generate antibodies that recognize BA.2.

2023年1月3日 · The variant is XBB.1.5, a highly contagious "recombinant" variant that spawned from two different BA.2 variants. It is related to the XBB variant, which was previously behind a COVID surge in...

2023年1月6日 · Variant XBB.1.5 is very contagious, meaning everyone is at risk even if you've already been infected. As the U.S. enters year 3 of the pandemic, here's an update on the state of COVID.

2023年5月11日 · Our multiscale investigation provides evidence suggesting that XBB is the first observed SARS-CoV-2 variant to increase its fitness through recombination rather than substitutions. The SARS-CoV-2...

2023年1月3日 · But on Friday, the US Centers for Disease Control and Prevention’s Covid-19 variant dashboard revealed a new dark horse that could soon sweep the field: XBB.1.5. The CDC estimates that XBB.1.5 has...

2023年1月6日 · Omicron XBB.1.5 is a recombinant (or a hybrid) of two omicron sublineages that descended from another omicron subvariant called BA.2, according to experts at the World Health...

2022年10月19日 · The XXB variant of Covid-19, touted the most contagious variant by some experts, have seen a rise in the densely populated areas of Mumbai, Thane and Raigad in Maharashtra

2024年2月1日 · During fall 2023, XBB lineages co-circulated with JN.1, an Omicron BA.2.86 lineage that emerged in September 2023. These variants have amino acid substitutions that might increase escape from neutralizing antibodies. XBB lineages predominated through December 2023, when JN.1 became predominant in the United States.

2022年10月27日 · Based on currently available evidence, the TAG-VE does not feel that the overall phenotype of XBB* and BQ.1* diverge sufficiently from each other, or from other Omicron lineages with additional immune escape mutations, in terms of the necessary public health response, to warrant the designation of new variants of concern and assignment of a new ...

2022年10月11日 · The contagiousness and resistance to vaccines of a new strain XXB of Omicron concern the scientific community. THE ESSENTIAL Covid is on the rise in some European countries with several variants responsible for this eighth wave.