The new Omicron subvariant suddenly making up 40 per cent of cases in the U.S. may be better at evading antibodies than previous variants, according to some experts.
At the beginning of December, Omicron sub variant XBB.1.5 made up just 1.3 per cent of all COVID-19 cases in the U.S. By the end of that same month, XBB.1.5 was responsible for 40 per cent of cases in the U.S,The percentage of cases attributed to XBB.1.5 doubled in the span of one week at the end of December, from 21.7 per cent to 40.5 per cent, according to the CDC.
“At this time, it is too early to tell if the XBB.1.5 variant is growing in Canada,” the agency stated.COVID-19 Brief newsletter: Sign up for an informed guide on the pandemicXBB.1.5 is the latest in a long string of descendants of the Omicron variant of SARS-CoV-2, the virus that causes COVID-19. It’s currently unclear where XBB.1.5 first emerged, but scientists began to warn about a new Omicron lineage in the fall., the World Health Organization explained that XBB and its sublineages were actually a recombinant of the Omicron BA.2.10.1 and BA.2.75 subvariants. This means that the two variants exchanged genetic material to create a new version that carries aspects of both, something that can occur when two different variants co-infect the same cell.
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