Pneumonia may be caused by an infection or injury of the lungs.
Common bacterial pneumonia can be caused by streptococcus pneumonia or klebsiella pneumonia .
Injury of the lungs can be caused by a bacterial infection.
injury of the lungs can be caused by what
Options:
A) running
B) wind and erosion
C) breathing
D) cigarettes
E) Pesticides
F) bacterial infection
G) smoking cigarettes
H) foggy air