I can only comment on my own experience. Before I retired and before I was diagnosed with Bronchiectasis, I had frequent respiratory infections, including pneumonia and sinus infections. I worked in elementary schools, so was constantly exposed to sick children and small rooms with poor air quality. I once requested testing of the air, which identified mold. They told me it would be remedied over summer vacation! Because I have been super vigilant about exposure since COVID started and still wear a mask when in public, I have had very few infections. I also learned on my own of the importance of exercise, which made a huge difference. I have only been nebulizing albuterol and saline since last summer. I have always had problems with anxiety/stress and have to try to avoid allowing myself to overreact to situations over which I have no control, because that also tends to bring on exacerbation. This may be more than you wanted to know, but in general, get enough sleep, eat a healthy diet, exercise, and avoid exposure to others who are contagious. Best of luck in your effort to stay healthy! Donna Turnbaugh