Ozone gas can kill several microorganisms, such as bacteria, viruses and fungi. This is due to its high oxidizing power. The mechanism of action of ozone against bacteria and fungi, for example, occurs “from the outside in”. Ozone destroys the cell wall of these microorganisms, via chemical oxidation reactions, until it penetrates the interior of the microorganism, also damaging agents vital to its life, culminating in its death. In the case of viruses, the action occurs in the same way. When in contact with it, ozone destroys the virus by diffusing through the viral envelope and/or the protein coating (viral capsid) towards the nucleic acid nucleus, resulting in damage to DNA or RNA.