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  1. Apr 27, 2023 · Together the omicron variants make up nearly all COVID-19infections in the United States. This is an estimate from early 2023 based on genetic sequencing of samples from people with COVID-19infections, according to the CDC. People who are up to date on their vaccines can get breakthrough infections. They can then spread the virus to others.

  2. Apr 26, 2023 · Dr. Peter Chin-Hong, a professor of infectious disease at the University of California, San Francisco, said that aside from the increase in transmissibility, so far XBB.1.16 is not too different...

  3. May 22, 2021 · Scientists reported the discovery of an entirely new coronavirus in Malaysia this week, one that likely came from dogs. It doesn't cause COVID-19. But it could be just the eighth coronavirus ever ...

  4. May 23, 2023 · Since 2009, American scientists have discovered more than 900 new viruses, "60 Minutes" reported last year. One potential threat comes from the human encroachment on natural bat habitats .

  5. Jan 20, 2023 · FRIDAY, Jan. 20, 2023 (HealthDay News) -- The new coronavirus continues to dodge, duck, dip and dive, mutating again and again to find its way past people’s immune defenses. The latest COVID...

  6. Jan 3, 2023 · The CDC estimates that XBB.1.5 has more than doubled its share of the Covid-19 pie each week for the last four, rising from about 4% to 41% of new infections over the month of December. In the...

  7. Jan 14, 2022 · So for a new variant to spread to more people and outcompete previous variants, it needs to become really good at infecting a person's nose and airway. But it doesn't matter how well the new ...

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