Trials of a cancer 'vaccine' have begun and presenter James meets Steve, one of the first patients to trial the new treatment, Steve remembers his shock at being diagnosed with colorectal cancer in his 40s and tells the story of how he became involved in this pioneering research into tackling cancer. The vaccine is based on the same mRNA technology as the Pfizer-BioNTech COVID-19 vaccine and James heads to the University of Cambridge to find out how the early work into cancer vaccines became the foundation for the rapid rollout of the covid vaccine. In the lab, molecular biologist Dr Anne Willis and immunologist Dr James Thaventhiran explain how the vaccine is personalised to target the unique make-up of an individual patients' cancer cells, and how if the trials are successful they could open the door to mRNA treatments being used to treat a wide range of diseases. Also, Imperial College London cyber security researcher Dr Saira Ghafur joins James in the studio to explain why healthcare is a growing target for cyber attackers and how we can prepare for the next one because, as Saira says, it really is a case of "when" not "if". Presented by James Gallagher Produced by Tom Bonnett with Hannah Robins Assistant Producer: Katie Tomsett Editor: Holly Squire