If its not comete immunity after one dose, its not a vaccine.
If it is a vaccine, you can't be infected nor can you infect others.
Vaccines, true vaccines don't require boosters or annual shots.
If masks work, why isn't coronavirus essentially gone?
How am I still a "danger" to you if I got the vaccine?
If we "don't know how long immunity lasts" then why are we calling it a vaccine, and why must we take it?