“…Patient 1, T0: presence of 40% ground glass pneumonia, T3: presence of 70% ground glass pneumonia and septal thickening, T6: presence of honey combing; Patient 2, T0: presence of 35% ground glass pneumonia, T3: improving of ground glass and parenchyma bands, T6: presence of 35% ground glass pneumonia; Patient 3, T0: presence of 25% ground glass pneumonia, T3: not available, T6: presence of 20% ground glass pneumonia and parenchymal bands The frequency of this chronic lung damage after COVID-19 and its underlined mechanisms have yet to be clarified; clinical trial might be warranted to investigate the timing and the endurance of treatments to prevent it. Silvia Piantoni MD, PhD 1,2 Luisa Salada MD 3,4 Enrico Colombo MD 3,5 Monia Mendeni MD 3,5 Ezio Damiolini MD 3,4 Diego Gatta MD 3,4 Donata Richini MD 3,5 Roberto Furloni MD 3,5 Paolo Airò MD 1 Mirko Scarsi MD 3,5 1 Rheumatology and Clinical Immunology Unit, ASST Spedali Civili, Brescia, Italy…”