11.   Sulfur trioxide, used to make soap, turns into sulfuric acid when exposed to the air or water and can cause severe lung damage.

12.   The trainer died from a severe lung infection known as interstitial pneumonia.

13.   The urushiol can become airborne and cause severe lung damage if inhaled.

14.   Workers in two states have come down with a severe lung disease that is apparently linked to their work with vats of artificial butter flavoring, doctors have reported.

15.   Cystic fibrosis causes the body to produce abnormally thick mucus, which can cause severe lung infections and digestive difficulties.

16.   Following the surgery, Tom developed a severe lung infection called pneumonitis and doctors once again feared for his survival.

17.   Many suffered from severe lung burns.