I think the therapies are credible - perhaps part of the problem is the detoxification reaction the ozone is creating. It is a powerful liberator of toxins especially in deep tissue. Personally I think chelators are necessary to help the body liberate the toxins.
Did the doctor check your vitamin d levels? Lysine would help in any viral situation and I am a big fan of astragalus (I have used Zand's astragulus formula for many years) it is considered to be tonifying by the Chinese and apparently has anti-viral properties. Obviously you should research this before embarking.