To reduce the chances of another flare-up: do not smoke and avoid inhaling airborne irritants; be up to date on vaccines; do regular exercise; use an inhaled medication approved by FDA that reduces the chances of flare-ups. Furthermore, four medical conditions should be considered: 1) Aspiration - when food, saliva, liquids, or vomit slips into the lungs; 2) Bronchiectasis - a chronic lung condition in which the walls of the large airways (breathing tubes) become damaged and widened; 3) Common Variable Immune Deficiency - a deficiency of Immunoglobulin G makes someone more susceptible to a bacterial infection; and 4) Vitamin D deficiency.