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  1. 2023年8月17日 · What Is the Omicron Variant? In November 2021, the World Health Organization (WHO) first identified the Omicron mutation of the COVID-19 virus as a variant of concern. It quickly became the most...

  2. 2023年11月15日 · Among the COVID strains you may have heard of are Delta and Omicron. Delta was the most common in the U.S. in the fall of 2021. In 2023, Omicron was the dominant strain. Learn more about the...

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  4. 2024年1月7日 · The Omicron variant has a shorter COVID-19 incubation period compared with other variants. For the Omicron variant, the incubation period is 1-4 days. Can I Get or Spread COVID-19 During or...

  5. 2023年5月26日 · Written by Ralph Ellis. 2 min read. May 26, 2023 – About 10% of people infected with Omicron reported having long COVID, a lower percentage than estimated for people infected with earlier strains...

  6. COVID-19 symptoms of Omicron variant COVID-19 Omicron symptoms are usually mild. They tend to include sore throat, runny nose, and other symptoms similar to a cold.

  7. 2023年12月19日 · Since the beginning of the pandemic there have been several COVID-19 variants, including Alpha, Beta, Delta, and Omicron, with a range of dominance among the strains.

  8. 2024年1月23日 · 4 min read. Jan. 23, 2024 – You’ve got the symptoms, but your test for COVID-19 isn't positive. You’re not alone. JN.1, the now-dominant variant that accounts for nearly 86% of all circulating...