Funny humbles first results at curing malaria was with stablized oxygen with 3% CLO2! What motivated him to increase the dose to the toxic 28% ?? Curious!
He used Sodium Chlorite in water (stabilized oxygen). It didn't work on Malaria every time so he then started adding a teaspoon of vinegar to the water and sodium chlorite, and then waited for 24 hours to produce enough chlorine dioxide. He then found if he put a lid on top it would produce the same amount of chlorine dioxide in 2 hours. Later he started mixing the acid and sodium chlorite directly before adding the water and that is what we have now.
The 28% solution is perfectly safe as you are diluting it with water before drinking it!