<unk>  is inflammation of the lungs due to breathing in a foreign substance, usually certain types of dust, fungus, or molds.
Hypersensitivity pneumonitis
Chemical pneumonitis
CMV pneumonitis
Diffuse panbronchiolitis
Atypical pneumonia
Eosinophilic pneumonia
Idiopathic interstitial pneumonia
Pulmonary alveolar proteinosis