The U.S. has detected the nation's first case of the omicron variant of the coronavirus in California, the Centers for Disease Control and Prevention (CDC) said Wednesday.

The individual was a fully vaccinated traveler who returned from South Africa on November 22, the CDC said. The person had mild symptoms that are improving, and is self-quarantining.

The person has since tested negative, and all close contacts have also tested negative, the CDC added.

--Developing... Read More: The Hill