To investigate the impact of AEC‐II‐derived Rmrp on AM glycolysis, SII, and secondary pneumonia in vivo, we generated AEC‐II‐specific Rmrp knockout (Rmrp∆AEC–IIs) mice by crossing Rmrp floxed mice (Rmrpfl/fl) with Sftpc‐Cre mice (SftpcCre) (Figure S19A, B, Supporting Information). The gene discussed is SFTPC; the disease is pneumonia.