Good morning Donna. I did so much research looking for new treatments for COPD. When I ran across the Dupiexnt I was thinking this is may be my last option. I compared what the medicine does to my lab results. The medicine targets eosinophil. This is a white blood cell that causes inflammation which happens with allergies. I looked on my patient portal and looked at my CBC blood test results and sure enough my eosinophil white cell count was high meaning there was something causing an allergic reaction which caused the inflammation in my lungs or airway. I'm just grateful I found this information and hope that it can help someone else. Maybe when you go back to your doctor ask him is your eosinophil white blood cell count high. If it is then you know you are on the right track. Good luck and keep me posted on your progress.