I put together a group of people to check out Miracle-Mineral-Supplement a few years ago. Over the years the group has changed a little, but we are still around and are exploring how the body uses oxidation. I work around these chemicals and have some access to a laboratory to run tests.
Chlorine dioxide is effective against bacteria, fungus, and viruses IF the proper concentration is held in contact with the pathogen for the proper amount of time. This is referred to as the CT value. This also goes for other oxidizers like ozone and hydrogen peroxide. A lot of testing has been done on chlorine dioxide to determine the proper amounts needed for water treatment and sanitizing use. Some testing has been done for topical applications, but unfortunately no testing has been done using chlorine dioxide or chlorous acid inside the human body.