The segment is well worth watching. They didn't hammer on this too much, but the fact of the matter is we will continue to have new variants come to the fore as long as we have high rates of transmission and infection — anywhere in the world.
In the race between vaccinating people here in the United States and the spread of the "current" variants, I still give the nod to the variants in winning the current race. Watch for the "Fourth Wave" of infections, hospitalizations and deaths coming in April and May.