POTUS is setting the stage using Operation Warp Speed, the vaccine is just a front to move our Mil in key positions without causing widespread panic.
Here's how I see it playing out. The name 'Warp Speed' in itself gives us some clues. What if everything happens all at once? The military will already be deployed to necessary positions and the news/proof of Treason and other crimes would 'delay' the vaccine injections.