“Currently XBB.1.5 has a 120% weekly growth advantage, which equates to, on average, 1 infected person infecting 2 others,” Dr. Katelyn Jetelina, an epidemiologist and author of the popular Substack column “Your Local Epidemiologist,” recently wrote.
overall across the country, not only in areas where XBB.1.5 is present, so it’s difficult to say with certainty that the new Omicronstrain is what’s driving the increase in COVID-related hospitalizations right now. Nevertheless, experts expect XBB.1.5 to continue spreading. How big or severe a wave it will cause is not clear yet, but someIs XBB.1.
Maria Van Kerkhove, the WHO’s COVID-19 technical lead, told reporters during a press conference in Geneva on Wednesday that XBB.1.5 “is the most transmissible subvariant that has been detected yet” and that her organization was conducting an assessment to determine its risks. That information, she said, should be available in the coming days.
“Anything that lets you enter the whole cell more quickly is more transmissible basically, [and] binds more tightly ... and then you know, you get infected,” Gandhi said. recombination of two descendants of the Omicron BA.2 subvariant, which drove a small wave of cases in the U.S. last spring, and a new sublineage called XBB.that XBB is one of the most immune-evasive strains of the coronavirus yet. Since XBB.1.5 is its close relative, experts predict it will also be capable of evading antibodies from vaccines, COVID infections or both.
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