By Michael Balsamo and Zeke Miller

A person in California who had been vaccinated against COVID-19 became the first in the U.S. to have an identified case of the omicron variant, the White House announced Wednesday as scientists continue to study the risks posed by the new virus strain.

Dr. Anthony Fauci told reporters the person was a traveler who returned from South Africa on Nov. 22 and tested positive on Nov. 29. Fauci said the person was vaccinated but had not received a booster shot and was experiencing “mild symptoms.”

The Biden administration moved late last month to restrict travel from Southern Africa where the variant was first identified and had been widespread. Clusters of cases have also been identified in about two dozen other nations.

“We knew that it was just a matter of time before the first case of omicron would be detected in the United States,” Fauci said.

He said the person was improving and added, “I think what’s happening now is another example of why it’s important for people to get vaccinated. But also boosting. Boosting is very important.”

Officials said they had contacted everyone who had close contact with the person and they had all tested negative.

Genomic sequencing was conducted at the University of California, San Francisco and the sequence was confirmed by the Centers for Disease Control and Prevention.

The Centers for Disease Control and Prevention is taking steps to tighten U.S. testing rules for travelers from overseas, including requiring a test for all travelers within a day of boarding a flight to the U.S. regardless of vaccination status. It was also considering mandating post-arrival testing.

Officials said those measures would only “buy time” for the country to learn more about the new variant and to take appropriate precautions, but that given its transmissibility its arrival in the U.S. was inevitable.

Much remains unknown about the new variant, including whether it is more contagious than previous strains, whether it makes people more seriously ill, and whether it can thwart the vaccine. Fauci, the top U.S. infectious disease expert, said more would be known about the omicron strain in two to four weeks as scientists grow and test lab samples of the virus.

California’s Department of Public Health credited the state’s “large-scale testing and early detection systems” for identifying the case.

“We recognize that everyone is exhausted, and the news of a new variant can be overwhelming. It is important that we collectively focus on the things we know prevent the spread of COVID-19, and its variants,” state public health officials said in a statement.

The announcement of the first U.S. case comes before President Joe Biden plans to outline his strategy on Thursday to combat the virus over the winter. Biden has tried to quell alarm over the omicron variant, saying it was a cause for concern but “not a cause for panic.”

Biden and public health officials have grown more urgent in their pleas for more Americans to get vaccinated — and for those who have been vaccinated to get booster shots to maximize their protection against the virus.

Updated on December 1, 2021, at 3:45 p.m. ET with the latest details.

Share:
More In Science
Beyond Meat Expands McDonald's Deal As Fast Food Reign Continues
Plant-based meat giant Beyond Meat's reign over the fast food world continues, as McDonald's announced that it is expanding its test of Beyond's McPlant burger, to nearly 600 restaurants, an increase from the eight that it's been testing in since November. This comes less than two weeks after Beyond Fried Chicken made its nationwide debut at KFC restaurants, the first time that plant based chicken has been widely distributed in a fast food capacity. Arun Sundaram, Senior Equity Analyst at CFRA Research explains why these latest collaborations may be proof that Beyond Meat products could slowly be becoming an unlikely staple in the fast food and chain restaurant world as consumers opt for more healthy food options.
BD Veritor Hopes to Take 'Guesswork' Out With Smartphone-Enabled COVID Test
BD Veritor is a variation of the at-home COVID test that uses a smartphone to interpret the results. The test is taken via a nose swab test strip that is then scanned by your phone’s camera with the result clearly displayed as positive or negative. James Walker, vice president of integrated diagnostics USA for BD, joined Cheddar to discuss how the test hopefully takes the "guesswork out of testing." Walker also went into what BD is doing to deal with the surging demand for at-home tests amid the omicron spread. "While we don't disclose how much we produce, we have capacity to manufacture up to 12 million rapid antigen tests per month and are delivering on our commitments to distributors and retailers," he said.
Robotics for Eyelash Extensions; Innovation in Food Tech
On this episode of Cheddar Innovates: Sidechef CEO breaks down how it's building a platform to make recipe shopping easy; Luum CEO explains the process of having a robot put on eyelash extensions; A look at Curiosity Stream's new original series, 'Evolve.'
Moderna's Chief Medical Officer on Omicron Booster Trial, Annual Shots
Moderna launched a clinical trial of a COVID-19 booster shot specifically targeting the omicron variant. The first participant has already received a dose, and Moderna expects to enroll about 600 adults total, split between two groups. In the first group, participants will have previously received two doses of the Moderna vaccine, and in the second, participants will have received its booster. Dr. Paul Burton, chief medical officer at Moderna, joined Cheddar’s Opening Bell to discuss the trial, yearly boosters, and what lies ahead for the company.
Beijing Pledges to Host 'Low Carbon' Olympic Games
With the 2022 Beijing Winter Olympics right around the corner, experts are warning that climate change is threatening not only the event but also the future of snow sports. Despite being the world's top polluter, China is hoping to use the event to demonstrate the country's commitment to fighting climate change, and pledging to host a "low carbon" games. Xubin Zeng, professor of hydrology and atmospheric sciences at the University of Arizona, joins Cheddar News.
Study Finds Payments for Low-Income Mothers May Impact Infants' Brains
New research is suggesting that giving extra cash to low-income mothers can actually influence the brain development of their infants. These findings provide the first rigorous evidence of how payments and monetary support can affect children in the early years of life. Authors of the study, Nathan Fox, professor in the department of human development at the University of Maryland, and Sonya Troller-Renfree, postdoctoral research associate at Teachers College at Columbia University, join Cheddar News to discuss.
Load More