Depends on if the .gov decides to go for 100% forced vaccination.
As in door to door with guns.
“Depends on the vaccine. Always has”
I agree with your description. In this case, the constant mutations, from whatever cause, make for a leaky vaccine that can permit an infection without obvious symptoms. Vaccines against viruses like this and the flu are trying to hit a moving target.
Considering the effectiveness, cost of treatment and lack side effects, monoclonal antibodies are much better than pre-treatment with a sketchy genetic therapeutic. Or so says a nobody.