Analysis of Specimens From Individuals With Pulmonary Fibrosis

* INCLUSION CRITERIA: Individuals who are 18 years of age or older with any of the following: * Idiopathic pulmonary fibrosis \[defined by the American Thoracic Society/European Respiratory Society guidelines\], * Familial pulmonary fibrosis \[defined as idiopathic pulmonary fibrosis in two or more first-degree relatives\], * Relatives of patients with hereditary pulmonary fibrosis, * Hermansky-Pudlak syndrome (diagnosed by paucity or deficiency of platelet dense bodies on whole mount electron microscopy or by genetic testing), * Pulmonary fibrosis associated with collagen vascular diseases or autoinflammatory disorders, * Pulmonary fibrosis post-COVID-19 \[i.e., pulmonary fibrosis in an individual recovering from SARS-CoV-2 infection\], or * Healthy research volunteers by history and indicated tests (individuals without history of chronic pulmonary disorder, collagen vascular disease, or bleeding disorder). EXCLUSION CRITERIA: Individuals with any of the following: * Significant inhalational exposure to fibrogenic fibers or dusts or exposure to drugs associated with pulmonary fibrosis, * Uncontrolled ischemic heart disease, * Uncorrectable bleeding diathesis, * Pregnancy or lactation (excluded due to exposure of unnecessary risks), or * Inability to give informed consent (excluded due to exposure of unnecessary risks).