Post-discharge chest CT findings and pulmonary function tests in severe COVID-19 patients

•Severe COVID-19 survivors can still have chest CT abnormalities after discharge, even beyond three months after the disease onset.•The percentage of compromised lung volume on CT correlates with pulmonary function tests and dyspnea severity.•Pulmonary function tests indicate an impairment of diffusion capacity and a tendency toward restrictive physiology in most cases.•An underlying pulmonary vasculopathy is possibly implied in a minor proportion of patients.