Safety and efficacy are almost irrelevant.
The real sticking point (pardon the pun), is the idea of vaxx passports (state mandated medical procedures).
Once the collective (unelected bureaucrats in the health system) has given itself the right to impose whatever procedures it deems necessary, on the individual, then we can no longer claim to own ourselves or our bodies in any real sense.
Actual passports were rolled out as a temporary, emergency measure during WW2, but as they say, "There's nothing so permanent as a temporary government measure".
To be honest, the civil war at the end of this road we're on, will kill a lot more people than Covid. Let's just not.