So you’ve taped off every opening, hung plastic everywhere. You’re even blowing a box fan out the window or using an air cleaner. That’s supposed to manage the airborne material. Looks like it’ll work.
Now it’s go-time.
You drive your demo bar into the plaster and lath, start sanding all that drywall, or start making all those zillion cuts for the new trim or floor thinking the rest of the house is completely cordoned off from dust.