The United States, at this point, is not included in the new travel restrictions in place in a handful of countries worldwide because of a new coronavirus strain in the United Kingdom, which may be up to 70% more transmissible than the earlier type of coronavirus that spread worldwide.

More than 40 countries have banned travel from the United Kingdom following concern about the new strain. The list includes Canada, Spain, Russia, Germany and France.

Today is the second day of a 48-hour shutdown of France's border with the U.K. The United States is not on that list.

Dr. Anthony Fauci says it's possible the new variant from overseas could already be in the U.S.

"Given the travel throughout the world, I would not be surprised if it's already here," says Dr. Fauci. "When we start to look for it, we're going to find it. Certainly, it's not yet the prevalent one, the way it seems to have assumed that prevalent nature in the U.K., but we're going to be looking for it, and I'm sure sooner or later, we're going to run into it and find it."

Flights continue from the U.K. into Newark Liberty International Airport and many other airports around the country. There are specific rules in place about mask wearing, where some travelers could be fined if they don't wear masks.

The TSA released the number of travelers screened nationwide Monday -- more than 950,000. Each of the previous three days saw more than one million passengers screened, which is the first time there has been three one-million plus days during the pandemic.

Dr. Fauci says he does not believe the U.S. should impose any sort of travel ban as of yet.