TGF‐β‐EVs and shRAB27B‐EVs significantly suppressed the breast cancer‐killing ability of T cells compared to vehicle control and con‐EVs, implying that the EV cargo altered by TGF‐β and RAB27B depletion gave EVs a more immunosuppressive effect (Figure 5j). The gene discussed is TGFB1; the disease is breast cancer.