You will be given a definition of a task first, then some input of the task.
In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.

selection of patients and acquisition of samples: The etiology of acute exacerbation of idiopathic pulmonary fibrosis remains unknown. Occult viral infection has been proposed as one possible cause of acute exacerbation of idiopathic pulmonary fibrosis. This study uses the most current genomics-based technologies to investigate the possible infectious etiology of acute exacerbations of idiopathic pulmonary fibrosis. Most cases demonstrate no evidence of viral infection. Torque teno virus was present in a significant minority of cases, and cases of acute lung injury.
Output:
Viral Infection in Acute Exacerbation of Idiopathic Pulmonary Fibrosis