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?
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Lots of good questions without any real scientific answers as far as I know.
This I can respond to though:
You may already know this, but many vaccines require boosters because we use a less immunogenic (and safer) form of the virus (e.g. inactivated or "dead" virus). While these rarely have lifelong immunity, immunity can last ten plus years.
Edit: I guess my point is that I would still call these vaccines, otherwise the term vaccine is more of an idea than an actual thing and no vaccines are actually vaccines.
If it requires a booster, its a therapy not a vaccine. Vaccines make you immune very soon after injection
I understand your point. Can you give an example of a true vaccine?