Pneumonia may be caused by viruses or 
bacteria a hazard cold weather humidity mildew PDAs injury methane
A B C D E F G H
Infections of the lungs can be caused by bacteria, viruses or fungi.
Pneumonia may be caused by viruses or injury 
Pneumonia may be caused by viruses or  (A) bacteria (B) a hazard (C) cold weather (D) humidity (E) mildew (F) PDAs (G) injury (H) methane