Dr. Mark W. Tong is a Spiritual healer and teacher, and was born with the knowing of assisting others in healing. Dr. Tong was invited to assist patients at an alternative cancer treatment center where he confirmed the known theory that cancer is a result of your own emotions. By incorporating the ideas and concepts that are used to assist cancer patients in being healed, you can Prevent Cancer. The text, "Prevent Cancer" earned him a doctorate degree in "Natural Healing."