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The Norwegian Breakaway cruise ship. Photo: Gerard Bottino/SOPA Images/LightRocket via Getty Images

The Centers for Disease Control and Prevention on Thursday said it is actively investigating or observing 91 cruise ships following COVID-19 outbreaks on board.

Why it matters: The Omicron variant has driven up infections across the U.S., upending vacation plans and disrupting travel. The new strain is the latest sign of the pandemic's hold on the cruise line industry.

  • The industry, which was an early epicenter for coronavirus outbreaks, staged a comeback in September, with several preventative measures in place to curb the spread of the virus.

Driving the news: The CDC is investigating 26 ships and is observing 65 ships following earlier investigations, according to the agency's latest update.

  • The affected cruise lines include Disney, Carnival, Royal Caribbean and Norwegian.
  • The CDC also said Thursday that passengers should "avoid cruise ships, regardless of vaccination status," citing an increased threat of COVID-19.

Worth noting: An additional three ships are being monitored due to reported COVID infections, though case numbers are below the agency's threshold to start an investigation — cases reported in more than 0.10% of passengers or a single crew member in the previous seven days.

What they're saying: "The Cruise Lines International Association (CLIA) and our members ... continue to have very productive dialogue and are working together with the CDC in the interest of public health and safety," Anne Madison, a spokesperson for the Cruise Lines International Association, said in a statement.

  • "Many of our members have announced additional measures in response to the Omicron variant, including strengthening testing, masking and other requirements, as well as encouraging booster vaccine doses for those eligible—and some cruise lines are requiring an additional test at embarkation," she added.

Go deeper: CDC: Avoid cruise ships regardless of COVID vaccination status

Editor's note: This story has been updated with new numbers from the CDC and comment from the Cruise Lines International Association.

Go deeper

Jan 15, 2022 - Health

Experts warn of more COVID-19 variants after Omicron

Three COVID-19 testing companies place testing locations outside Grand Central Terminal on Jan. 14 in New York City. Photo: Alexi Rosenfeld/Getty Images

Experts are warning that subsequent COVID-19 variants are likely to come after Omicron, AP reports.

Why it matters: The warnings come as there's no guarantee that subsequent variants "will cause milder illness or that existing vaccines will work against them," underscoring the need for widespread vaccination, AP writes.

52 mins ago - World

Pentagon: 8,500 troops on high alert for possible deployment to eastern Europe

Photo: Anna Moneymaker/Getty Images

Defense Secretary Lloyd Austin has placed 8,500 U.S. troops on "heightened preparedness to deploy" to eastern Europe in case NATO activates its rapid-response force over tensions with Russia, the Pentagon announced Monday.

Why it matters: No decisions have been made to actually deploy U.S. forces, but the heightened alert level will allow the military to rapidly shore up NATO's eastern flank in the event that Russia invades Ukraine. The Pentagon warned that Russia has shown "no signs of de-escalating," and continues to amass troops on Ukraine's borders.

Updated 1 hour ago - Economy & Business

S&P 500 on track for worst-ever start to year

Data: FactSet; Chart: Axios Visuals

Stocks suffered their steepest drop of the year early Monday, putting the S&P 500 on course for its worst-ever start to a year.

Driving the news: The benchmark S&P 500 dropped for its fifth straight day, with losses nearing 3% in early trading, momentarily putting it on track to fall into a "correction." Some of the steepest losses were recovered in early afternoon trading.

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