Ozone is an unstable, but highly beneficial molecule. It's the tri-atomic form of oxygen: Instead of the normal arrangment of 2 atoms of oxygen (O2), ozone is comprised of 3 atoms of oxygen (O3). Ozone, however, doesn't want to stay in that tri-atomic state very long and unless held in check or bound by other molecular couplings, ozone will usually break down from O3 to O2 + O1 within 20 minutes of so (at atmospheric pressure at least). O1 is called a singlet oxygen atom and it's HIGHLY REACTIVE with just about any substance that should NOT be in the human body including all pathogens (virus, bateria, etc.) and synthetic compounds or their metabolites such as drugs and their metabolite residues.
