In the quantities necessary to be effective, Ozone is very gentle to humans and equipment in the water. Depending on the concentration, the odor ranges from slightly sweet to moderately antiseptic. It is one of the most effective, complete bactericides of all Earth's measurable elements. In the quantities needed for water purification, it has no noticeable order, taste or color. It is not irritating to humans or equipment.
Ozone leaves no by-products except pure oxygen.
In contrast, chlorine leaves a chemical by-product called hydrochloric acid and additional salts in water applications. Ozone kills virtually all known forms of viruses in water and air. Yes, with proper filtration it should completely eliminate them. Ozone can be produced in a number of different ways, however the most common method is via Ultraviolet Light Generation. This all occurs instantly inside the Ozone chamber in the Ozone Generator.