This report provides a detailed review of the scientific literature regarding the
biocidal activity of gas-phase ozone. Many claims about its efficacy in reducing microbial
contamination have been made by the manufacturers of ozone generators, which have
unfortunately found their way into the popular press. However, this review of the
peer-reviewed, published, scientific literature has found no appreciable antimicrobial
effect of gas-phase ozone on either airborne or surface microorganisms. Its potential role
in the control of biological pollution in the indoor environment is not substantiated by
scientific investigations.
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