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Ultra-low tidal volume (ULT) is an appealing alternative for severe acute respiratory distress syndrome (ARDS) patients with the aim to alleviate excess lung stress and strain. A recent article showed that ULT without extracorporeal carbon dioxide removal did not improve prognosis in moderate-to-severe coronavirus disease 2019-related ARDS patients. However, several reasons should be considered before drawing the definite conclusion about the ULT strategy in severe ARDS.