The various vaccines work in very different ways, so I would expect each to have its own antibody signature

The 4 vaccine approaches are the same in the terms of the end results just that efficacy and antibodies level are different from patient to patient

The question now is the safety level because what happen to viral vector vaccines as it is only designed currently to be able to fight COVID20

Most likely in the future there would be probably yearly booster just like pneumococcal13 or 23 vaccine

Will be likely to seen in 2022 whether a single booster would be out because the difficulty and time needed to research again the study for any mutations which is why JnJ gonna be out with phase 3 result most likely early q2 and Arcturus gonna be phase 3 later in the year

KJ said herd immunity will only be achieved up to 18 months from now.
Anybody working in tourism will have to starve until then.