The minute the virus
escaped into the wild the whole world was on the back foot.
To my way of thinking... we are basically in the thick of a battle trying to get a handle on its spread and reducing it's impact.
Three immediate global impacts (leaving aside economics) and these have
never altered from day 1:-
1. potential deaths
2. potential long term damage to health
3. overwhelming of hospital and health systems if virus not stopped or brought under control in some way
The vaccine passport is just another tool in the battle to regain some sort of control over all three of the above.
It really is a simple as that.
If we need a covid vaccine passport to travel abroad etc., so be it