Pneumonia may be caused by an infection or injury of the lungs, and legionnaires' disease is a type of pneumonia. Given these facts, what may be caused by an infection or injury of the lungs among the following options:
- death and devastation
 - deadly and devastating
 - Legionnaires' disease
 - blood
 - smoking
 - a lot of human deaths
 - a tree falling
 - cigarettes


 

   Legionnaires' disease      