I had a cavity that would not heal. I tried using Red Light Therapy and after 3 months use, the cavity was healed. I can't swear that it was due to the light therapy, but it says it helps Bronchiectasis and COPD. I took a break from it and developed another cavity so started using it again consistently for about 3 months now so I'll see what the next CT scan shows. My sputum from my daily nebulizer use has decreased significantly with its use. I was diagnosed in 2018 at NJH in Denver and have been able to avoid antibiotic therapy...so far. My tests have been inconsistent.