Which is more serious, pneumonia or emphysema, depends on the extent of the pneumonia and the degree of infection. Patients with emphysema need to combine pulmonary function tests to determine the degree of airway obstruction. In the case of pneumonia in both lungs, a significant increase in leukocytes in routine blood tests, as well as a significant increase in C-reactive protein and calcitoninogen, bacterial pneumonia is most often considered. If it occurs in a patient with diabetes mellitus or autoimmune deficiency disease, the pneumonia can easily cause infectious shock and the condition will be relatively serious. If the emphysema is severe obstructive emphysema and combined with pulmonary heart disease, heart failure and respiratory failure may also occur, which is also a more critical condition.