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  1. Aug 27, 2022 · When a virus has one or more new mutations it’s called a variant of the original virus. Currently, the Centers for Disease Control and Prevention (CDC) has identified one variant of the virus (SARS-CoV-2) that causes coronavirus disease 2019 (COVID-19) as a variant of concern: Omicron.

  2. Apr 8, 2022 · A variant of concern has been observed to be more infectious, and is more likely to cause breakthrough infections or reinfections in those who are vaccinated or previously infected. These variants are more likely to cause severe disease, evade diagnostic tests, or resist antiviral treatment.

  3. Feb 3, 2023 · According to the CDC, the Omicron variant spreads more easily than the original SARS-CoV-2 virus and the Delta variant. In its early days, the variant caused an alarming spike in COVID-19 cases in South Africa—they went from 300 a day in mid-November 2021 to 3,000 a day at the end of that month.

  4. Jan 20, 2023 · The XBB.1 variants are dramatically better at evading the neutralizing antibodies in humans that protect against initial infection, according to a new study published Jan. 18 in the New...

  5. Jan 4, 2023 · Why new variants pose a threat As of early December, XBB and its subvariant made up fewer than 5% of cases, while variants BQ.1 and BQ.1.1 accounted for more than 60%. They now make up...

  6. Jan 10, 2023 · A new, rapidly spreading variant of SARS-CoV-2, the virus that causes COVID, means a rise in new infections could be around the corner. And while it likely won’t skirt immunity completely,...

  7. COVID-19 variants spreading across the U.S. are more infectious, cause more serious illness and are more deadly – but wearing a mask and social distancing still protect you, and they are as important as they’ve ever been.

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