DNA damage responses to RT also results in interferon‐γ (IFN‐γ) and tumour necrosis factor‐α (TNF‐α) production by NK cells41, 42, 73 and interleukin‐6 (IL‐6), IL‐12, TNF and IFN‐γ by TH type 1 (TH1) cells—typically aiding tumour cytotoxic immune responses21, 74 that boosts motility and tumour killing capacity of cytotoxic immune cells. The gene discussed is TNF; the disease is neoplasm.