Since Q has a Looking Glass and can determine all probable best futures, why would POTUS be allowed to catch Rona?

it has to be necessary to take us on the optimum timeline.

So why not just fake it?

are all the people infected from the ACB Rose Garden event in the cabinet or otherwise R's? They could all be in on the plot.

The rapid onset being different than regular Rona indicates either a new version or it's fake.

I'm going with fake. We are watching a movie.