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 is a fully vaccinated San Francisco resident who returned from South Africa on November 22, the CDC said. The person had mild symptoms, which are improving, and is self-quarantining.
All close contacts have also tested negative, the CDC added.
During a press briefing shortly after the case was disclosed, chief White House medical adviser Anthony Fauci urged Americans to get vaccinated against COVID-19 and said that those who are eligible should get their booster shots, describing the vaccines as the best protection against the virus and the omicron variant.
“We know what we need to do to protect people,” Fauci told reporters while encouraging Americans to wear masks in congregate settings to prevent the spread of the virus.