Glyceraldehyde 3‐phosphate dehydrogenase (GAPDH; degree = 13, closeness centrality = 0.54), Nucleoside diphosphate kinase B (NME2; degree = 6, closeness centrality = 0.44) and Cofilin‐1 (CFL1; degree = 6, closeness centrality = 0.42) were the three hub proteins of the pneumonia‐specific PPI network. Here, CFL1 is linked to pneumonia.