This rapidly progressive ILD with a poor prognosis includes acute exacerbation of idiopathic pulmonary fibrosis (AE-IPF), clinically amyopathic dermatomyositis (CADM), epidermal growth factor receptor-tyrosine kinase inhibitor (EGFR-TKI)-induced lung injury, and severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) infection, named coronavirus disease 2019 (COVID-19). The gene discussed is EGFR; the disease is interstitial lung disease.