No, they are just carriers.
The difference is, someone who is immune won’t infect other people, because the virus cannot survive and replicate in their body. A carrier may not get sick themselves, but they are still running around spreading the virus to everyone else.
Just wondering then does the virus float around like pollen or sticks to whatever they happen to hit; then this six foot rule. Where does the virus go after six feet? Sink to whatever surface is near or on to the floor?
So does normal breathing expel the virus?