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Omicron may cause milder disease. A lab study hints at why.The omicron variant of SARS-CoV-2 may be less efficient at infiltrating the lungs and spreading from cell to cell, early lab studies suggest.
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Breakthrough COVID cases may supercharge immunity, study hintsThere may be a silver lining to breakthrough infections, although they obviously still carry risks.
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Newfound flavor of omicron variant may be harder to trackThe newfound version, BA.2, may be slightly harder to track.
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Omicron variant may have evolved in rats, one theory saysSome features of the omicron variant's genome hint that it may have evolved in rodents.
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1st case of omicron variant in US confirmed in CaliforniaU.S. officials confirmed the first U.S. case of omicron in California.
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The Omicron variant: What we know so farOn Nov. 26, the World Health Organization (WHO) named a new coronavirus variant "Omicron" and designated it as a "variant of concern."
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FDA authorizes Pfizer and Moderna COVID-19 booster shots for all adultsOn Friday (Nov. 19), The Food and Drug Administration (FDA) authorized Moderna and Pfizer boosters for all adults, prior to the busy holiday season.
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A version of this gene doubles the risk of dying from COVID-19A version of a gene that doubles the risk of death from COVID-19 in people under 60 is carried by more than half of people with South Asian ancestry.
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California and Colorado start COVID-19 booster shots for all adultsCalifornia and Colorado expanded booster shot eligibility to all adults who received their second dose of Moderna's or Pfizer's COVID-19 vaccine at least six months ago.
