Dr. Fred Arnold attended the 3rd Annual Ozone Master Class February 16-18, 2018 in San Diego, CA for 24 hours of post graduate education. Dr. Silvia Menendez, PhD from Cuba was a key speaker who is an international authority on Ozone having conducted and published numerous scientific studies on the therapeutic benefits of Ozone. Another key speaker was Dr. Johann Lahodny, MD, PhD who is the originator of the 10 Pass High-Dose Ozone Therapy. All the speakers presented the most up-to-date information on Ozone Therapies that is being performed in the world today.