CNN Don Lemon Tonight December 2, 2021 08:01:00
>> this is the first confirmed case of covid-19 caused by the omicron variant detected in the united states. >> reporter: a fully vaccinated person, returning from south africa to san francisco, the first to test positive for the new variant about which it wille is known. >> have they had a booster shot yet? >> to my knowledge no. >> reporter: they returned to the united states on november 22nd and tested positive a week later, and is now isolating as close contacts are being traced and tested. >> all close contacts thus far have tested negative. >> reporter: the news coming as the cdc prepare...