Which from among the best vacuum cleaners is best for air quality?

Shark Navigator Zero-M Self-Cleaning Brushroll Pet Hair Pro (ZU62) Upright Vacuum

Its Anti-Allergen Complete Seal Technology removes 99.99% of the harmful micro-organisms and germs lurking in the dark corners and the thick camouflaging carpets.  HEPA filters contribute to the same purpose, along with cleaning the dust & dirt.