The metabolism of most bacteria is on average one-seventeenth as efficient as our own. Because of this, most cannot afford to produce disposable anti-oxidant enzymes such as catalase. Very few types of bacteria can live in an environment composed of more than two percent ozone. Ozone is effective against all types of fungi. This includes systemic Candida albicans, athletes foot, molds, mildews, yeasts and even mushrooms.
Ozone fights viruses in a variety of ways.
As discussed above, ozone also goes after the viral particles directly. This is how the virions enter the cell. Cells already infected have a natural weakness to ozone. Due to the metabolic burden of the infection the cells can no longer produce the enzymes necessary to deal with the ozone and repair the cell. Ozone is antineoplastic.