In this video, Tom Lowe, director of Physicians Awareness UBI, and Kenneth J. Dillon, author of Healing Photons, discuss the history, science, challenges, and promise of Biophotonic Therapy. Also known as ultraviolet blood irradiation, BT treats small amounts of blood with light in extracorporeal or intravenous modes. BT was invented by Emmet Knott in the 1920s. Hundreds of clinical studies have shown its effectiveness in various indications, e.g., against childhood asthma. Thousands of practitioners around the world use it to treat a wide range of disorders. BT is the leading phototherapeutic treatment of infectious diseases.