“…EVs are regarded as significant signalling mediators for intercellular communication, partially due to their ability to transport particular proteins, mRNA, and microRNA (Camussi et al., 2010 ). Multiple preclinical studies supported MSC‐EVs to be a potential therapeutic strategy for ALI caused by different types of non‐infectious factors, such as LPS (Kaspi et al., 2021 ), smoke inhalation (Xu et al., 2020 ), burn (Liu et al., 2019 ) and trauma (Li et al., 2019 ). Besides, there is also a large body of evidence demonstrating that lung inflammation resulting from tracheal inoculation of live Escherichia coli (Curley et al., 2017 ; Devaney et al., 2015 ; Gupta et al., 2012 ; Kim et al., 2011 ; Lee et al., 2013 ; Monsel et al., 2015 ; Park et al., 2019 ; Sung et al., 2016 ) and Pseudomonas aeruginosa (PA) (Mao et al., 2015 ) is significantly reduced by MSCs (Curley et al., 2017 ; Devaney et al., 2015 ; Gupta et al., 2012 ; Kim et al., 2011 ; Lee et al., 2013 ; Mao et al., 2015 ; Sung et al., 2016 ) and MSC‐EVs (Monsel et al., 2015 ; Park et al., 2019 ).…”