Pneumonia is an infection in your lungs caused by bacteria, viruses or fungi. Pneumonia causes your lung tissue to swell (inflammation) and can cause fluid or pus in your lungs. It makes Glutathione deficiency of the lower respiratory tract in patients with idiopathic pulmonary fibrosis European Respiratory Society Improve Breathing Naturally with Nebulized Glutathione Nebulized Glutathione Therapy: Breathe Better in Pasadena CORR Frontiers Therapies for bronchiectasis: mechanisms and potential effects