Ozone is a free-radical
You can't use a free-radical to break down a free-radical. You will just add to the free-radicals in your body and cause further damage.
Ozone does kill germs, bacteria, fungi, and viruses, but that means that it also kills good cells; meaning that ANY cells it comes into contact with will be lysed.
Ozone cannot differentiate between bad organisms/cells and good organisms/cells. You body will just have to use more energy and use the lysosomes in your body to break down O3 and H2O2.