I have found out that my half brother (now in his 90's) has been on oxygen for several years because of COPD. He smoked until he was 50. I never smoked but was diagnosed with COPD and put on spiriva respimat last year and I'm in my 70's. Even though we're both lucky to have lived a long time without this health problem, I think there may be a correlation because many people never do get COPD even if they have smoked. I know I have some allergies because sometimes I start sneezing and go on for 8 or emore times before I stop. Sometimes it happens after I eat if I'm out in a restaurant, and I heard from his daughter that that happened to him also. Do you think this could be an inherited weakness?