XBB.1.9.1, XBB.1.9.2, and XBB.1.5.1 hold the third, fourth, and fifth spots, respectively, each representing an estimated 2.4% to 6.5% of cases. Detection of new dominant variants in cats trailed detection of the variant in the humans; however, we detected dominant titers against extinct variants even after human cases had declined, possibly indicating long-lasting humoral immunity (Figure 2). The pandemic is now in the age of recombinantsor existing variants that have combined with each other to potentially wreak more havocRyan Gregory, a biology professor at the University of Guelph in Ontario, Canada, toldFortune earlier this week. Gohil adds that the CDC's new findings are also forcing hospitals to recalibrate because treating delta or omicron requires different antibodies and medications. Message not sent. Identify the news topics you want to see and prioritize an order. "If you test positive for COVID-19, you must isolate," Arwady said. Only one member of the household was fully vaccinated, and all but one member, including the traveler, had experienced confirmed infections in 2020. Theyre lowest in the Northeast, where theyre estimated to fuel less than 2.5% of cases. Its still thought to represent more than three-quarters of U.S. cases, though levels are waning. It soon surfaced around the world and became the dominant variant in the U.S., where the CDC classified it as a variant of concern. Day 0 is the first day of. Overall seropositivity across We screened residual blood samples from 2,309 cats by using PVNA at a final dilution of 1:100; the samples were submitted to the University of Glasgow Veterinary Diagnostic Services laboratory (VDS) during April 2020February 2022 (Figure 1, panel A). For most people, severe disease from COVID isnt an issue right nowespecially not for the vaccinated. Garcia said that in addition to getting tested, you should also quarantine. Arcturus XBB.1.16 COVID variant: CDC tracker map shows spread Given the CDC's updated information, Gohil said, "The implication is that we have a lot of delta going on and that requires a lot more attention.". Omicron was initially identified in Botswana and South Africa in November 2021although later reports showed earlier cases in the Netherlands. All rights reserved. A case study of one infected household observed that it may take as little as three days for people to become contagious, compared with four to six days with earlier versions of the virus. Duration of Infectious Virus Shedding by SARS-CoV-2 Omicron Variant Those who are both fully vaccinated and boosted do not need to quarantine if they are a close contact of someone with COVID, but should wear a mask for at least 10 days after exposure. A lot of that is because many more people are vaccinated. Figure 2. We urge them to take all available precautions, including vaccination with boosters and masking.. This variant was thought to be slightly more contagious than Delta itself, but while Great Britain was tracking a steady rise of AY4.2, it did not rise as quickly in the U.S. How contagious is it? "This has to do with data from the CDC that really showed after seven days there's virtually no risk of transmission at this point," Arwady said.
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