Oh-h-h-h dear lawd-dy
well, that wasn't as bad as I thought it would be.
Just think of A-LL the people you and I know DON'T empty after each use.
When I used to have canister or uprights, I would always remove the bag after each use, put it in a plastic shopping bag, and carefully store it in the freezer. This was to freeze and kill the parasites, bugs, germs,.... whatever. And, the vacuum gave off a nice "clean freezer" smell, next time you vacuum.
I'll only use a vented central vac now. The suction is great and having all the dust and heat and chemical off-gassing and whatever else expelled outside keeps one healthy.
But hey, It was a long time coming to that revelation.