This BBC Learning English podcast discusses the potential for cancer vaccines. The hosts introduce the topic, highlighting the global impact of cancer and the recent breakthroughs in mRNA vaccine technology. They then explore how cancer cells evade the immune system, using expert interviews to explain the mechanisms involved and how new vaccines aim to “re-educate” the immune system to recognize and eliminate cancer cells. The podcast concludes by reviewing key vocabulary and revealing the answer to a quiz question about the first successful vaccine (smallpox). Listeners gain an understanding of the science behind cancer vaccines and learn new vocabulary related to immunology.