A recent clinical study by Chen et al. [1] reported that the trans-plantation of allogeneic menstrual-blood-derived mesenchymal stem cells (MSCs) significantly reduced the mortality of influenza A (H7N9)-virus-induced acute respiratory distress syndrome (ARDS) without harmful side effects. This work may simulta-neously provide a new insight into the treatment of ARDS caused by coronavirus disease 2019 (COVID-19).