Given that Nfe2l2 (NRF2), the most important transcription factor involved in antioxidative stress, was identified among the enriched NT genes (Figure 5E), we introduced the DEGs obtained from the naïve and BLP‐trained BMDMs into the NRF2 pathway and antioxidative stress pathway using GSEA and found that at 3 h after infection, these DEGs were positively correlated with both pathways (Figure 7D). This evidence concerns the gene NFE2L2 and infection.