According to research, the incidence of pulmonary fungus is very low, only about 0.02%. However, because the disease has non-specific signs and is often confused with bacterial infections, it is difficult to diagnose early. Pulmonary fungus is very dangerous if not detected and treated early, it can cause many complications with a high mortality rate.

Aspergillus is a fungus that can cause a variety of infectious diseases, depending on the host's immune status or lung structure. In particular, Aspergillus pulmonary disease is an invasive form that occurs mainly in patients with severe immunodeficiency, and if not treated promptly, it will affect the patient's life.