Air Borne Diseases
Oxygen added to the air may remedy air borne problems such as black mold (Stachybotrys chartarum). Building hardware such as the AranizerTM may help. 
Other popular methods are HEPA filters, electrostatic, negative ion generator, ozone generators, UV - ultraviolet, activated carbon, ionizer, ULPA, Gas & Odor Filtration, Gas Phase Filtration , zeolite, electrostatic precipitator technology, electrete http://www.wishgranted.com/aranizer/index.html

HYPOTHESIS
Anthrax theory by Dr Lorraine Day  http://www.goodnewsaboutgod.com/studies/anthrax.htm http://www.drday.com