I found this study of the use of chlorine dioxide inhalation

I was looking on the internet to see if i could find any information on the safety or toxicity of chlorine dioxide. I need this if i'me going to breathing it in. I need to know for shure. Anyway i found a study, which actually says that at low doses it's not toxic has "potent anti-microbial activity". What i'me wandering is is how the concentration in this study relates to the concentration in the 2-drop protocol? Here is the study

www.occup-med.com/content/7/1/2