can places of public congregation be set up as negative air pressure rooms

and would it be a good idea to do so in the case of current or future pandemics?

Would workplaces, grocery stores, restaurants, churches, etc. be set up to be negative pressure rooms where the air was constantly filtered towards the ceiling and passed through a series of HEPA filters to trap viral particles be effective at reducing transmission in indoor places?

Or would people constantly going in and out make that impossible to achieve?

Even if it could be achieved, would it effectively help to reduce transmission rates of airborne pathogens?

The purpose of negative pressure is to prevent air from leaking out through door gaps, cracks in the wall, etc. I’m not sure what good that does for people inside. Biology labs that work with dangerous pathogens are negative pressure, but that’s to protect people outside the lab. The people inside the lab are wearing bunny suits.

I was wondering if one of the ways the virus is spread is due to droplets that remain airborne, if there could be some kind of air filtration system that constantly draws the air upwards towards the ceiling where they would have a filtration system that possibly had HEPA filters and UV lights.