I must also add that I was diagnosed with COPD in 2004 with chronic bronchitis and mild emphysema basically COPD. I have never had a flu shot and I have had the flu 3 times in 66 years. Twice before I started smoking menthol cigarettes and one time after in the early '80s. I am not on a lot of meds either.
By the grace of God and watching or controlling what I consume has helped a lot along the way. Especially after retiring from a very stressful career as an electrical engineer for 35+ years! My stress relief has always been my music and playing bass guitar since 1964. I hope that my words are inspiring to many and they understand that they still have control over COPD if you logically think about your lifestyle.