At that point it is the straw that broke the camel's back. The public no longer listen. They lose control. That can't happen. Why not go to war if the public will just burn it all down. So they use the vaccine instead. It locks down and keeps borders closed. As it promises normality. Except what happens when it doesn't doing anything else. What happens when more and more don't take it. As it goes down age groups less take it. Because there are more population not taking it.

Sooner nobody listens. They have been robbed. There ain't no other unicorns.

At that point it is the straw that broke the camel's back. The public no longer listen. They lose control. That can't happen. Why not go to war if the public will just burn it all down. So they use the vaccine instead. It locks down and keeps borders closed. As it promises normality. Except what happens when it doesn't doing anything else.