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Prognosis

CDC Pares Omicron Estimate to a Still-Dominant 59% of U.S. Cases

  • Revised estimate smooths out an extreme surge seen earlier
  • Incubation period for omicron shorter, separate report finds
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Home Covid Tests Need to Be Cheaper: Johns Hopkins
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The omicron variant is causing an increasing share of coronavirus infections in the U.S., though its climb to dominance has been gentler than earlier estimates indicated, according to an updated federal model.

Omicron accounted for an estimated 58.6% of sequenced U.S. virus cases in the week ending Dec. 25, the Centers for Disease Control and Prevention’s Nowcast model showed Tuesday, up from an estimated 22.5% a week earlier. The once-dominant delta variant accounted for 41.1% of cases in the most recent period, according to the CDC.