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The recent COVID-19 outbreak at the SpaceX headquarters in Hawthorne, Calif., comes amid a new round of rising infections in California and across the country that have been fueled by the spread of the omicron variant.

SpaceX reports LA County's highest number of workplace COVID-19 cases

New data shows the Elon Musk-led company currently accounts for nearly 30% of workplace COVID-19 cases reported by Los Angeles County officials.

Becky Gonzalez, left, and her long-time friend, Mary Lou Samora, a 71-year-old COVID-19 patient, put their palms together after they shared some encouraging words at Providence Holy Cross Medical Center in Los Angeles, Friday, Dec. 17, 2021.

Omicron sweeps across nation, now 73% of US COVID-19 cases

The Centers for Disease Control and Prevention numbers show nearly a six-fold increase in the proportion of infections in only one week.

People wait at a street-side testing booth in New York's Times Square on Monday.

Omicron is now the dominant COVID strain in the U.S., making up 73% of new infections

Underscoring its high transmissibility, in a week, omicron went from a 12.6% share of new COVID infections in the U.S. to a dominant 73.2%, according to the CDC's latest estimates.

City residents wait in a line to receive free at-home rapid COVID-19 test kits in Philadelphia, Monday, Dec. 20, 2021.

Pfizer, Moderna vaccine boosters capable of producing virus-fighting antibodies against omicron

Vaccines in the U.S. and around the world do not offer as much protection against omicron as they have against previous versions of the coronavirus. However, vaccines still help — a lot.

A trader works on the floor of the New York Stock Exchange at the start of trading on Monday. Stocks around the world tumbled over fears of the omicron variant.

Stocks around the world were hit hard by omicron fears. Here are 3 things to know

The Dow Jones Industrial Average closed down 433 points and other exchanges around the world tumbled on Monday over fears about the omicron variant.

Scientists at UC San Diego collect wastewater to be tested for COVID-19 variants in this undated photo.

UCSD reports 'unprecedented' spike in wastewater COVID viral load

The amount of COVID-19 virus detected in wastewater has predicted the region's COVID-19 caseload up to three weeks ahead of clinical diagnostic reports.

A man walks by a closed cheese store on a normally bustling shopping street in the center of Amsterdam on Monday. Nations across Europe have moved to reimpose tougher measures to stem a new wave of COVID-19 infections spurred by the highly transmissible omicron variant. Netherlands has imposed a nationwide lockdown.

As omicron surges, nations announce rules on gatherings and travel ahead of holidays

European nations have implemented a wave of new restrictions as case numbers rise. And Israel has added the U.S. and Canada to its "red list" of countries that citizens are barred from traveling to.

The San Diego Viejas Arena jumbo screen reminds the public to wear their mask indoors, Dec. 17, 2021.

San Diego County sees slight decrease in COVID-19 hospitalizations

The number of coronavirus patients in San Diego County hospitals decreased by six people to 365, according to the latest state figures.

Commuters wearing face masks to help curb the spread of COVID-19 during rush hour at the Shinagawa train station in Tokyo on Oct. 1. Case numbers have dropped significantly in Japan since summer. Researchers are trying to determine why. One theory is that the willingness to wear masks has made a difference; other theories are being investigated.

The riddle of Japan's dramatic drop in COVID numbers

The turnaround came in the wake of a fifth wave of infections that peaked in August. Japan is trying to figure out why its COVID-19 case numbers and fatalities have plummeted.

Moderna says its COVID booster increases protection against omicron

Moderna said its current FDA-authorized 50-microgram booster shot increased antibody levels against omicron 37-fold compared to pre-booster levels.

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