Dr. Anthony Fauci, the director of the National Institute of Allergy and Infectious Diseases, said that it is possible that the Omicron Covid-19 variant is already in the United States but has yet to be detected.

“I would not be surprised if it is, we have not detected it yet, but when you have a virus that is showing this degree of transmissibility and you're having travel-related cases they've noted in other places already, when you have a virus like this, it almost invariably is going to go all over,” Fauci told NBC Saturday.