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May 3, 2024 · A new, fast-spreading COVID-19 variant called KP.2 is circulating in the United States and driving an increasing proportion of cases, sparking concerns about a potential summer wave. KP.2 is...
May 7, 2023 · It's about 1.2 times more infectious, more transmissible, than prior variants. So what we're going to see is, over the next several months and into the summer, this will become the dominant ...
Jun 14, 2022 · BA.4 and BA.5 may be the most transmissible versions yet. In some countries, those subvariants are replacing BA.2 roughly as fast as BA.2 replaced the original Omicron, the U.K. Health Security ...
Jan 28, 2022 · By Denise Chow. As coronavirus case numbers in the U.S. show early signs of tapering, scientists are keeping a watchful eye on a newly identified version of the omicron variant, nicknamed...
Sep 1, 2023 · Except in rare cases, the original version of Omicron is no longer circulating—neither is the original strain of the SARS-CoV-2 virus and the early, more severe Alpha and Delta variants. But, as of early September 2023, CDC estimates showed a long list of circulating Omicron subvariants, including more than a dozen XBB strains.
Dec 15, 2021 · As omicron cases multiply around the world, scientists are racing to characterize the heavily mutated coronavirus variant to understand how it spreads, and gauge new risks during this wave of...
May 24, 2022 · May 24, 2022, 12:20 PM PDT. A Covid-19 testing site in Times Square in New York City on May 17. New York City has raised its Covid-19 alert level to high amid increasing pressure on the health...
