( A ) Pneumonia is a communicable disease whereas the common cold is a nutritional deficiency disease
( B ) Pneumonia pathogen infects alveoli wheras the common cold affects nose and respiratory passage but not the lungs
( C ) Pneumonia is caused by a virus while the common cold is caused by the bacterium haemophilus influenzae
( D ) Pneumonia can be prevented by a live attenuated bacterial vaccine whereas the common cold has no effective vaccine
