Trials of a cancer 'vaccine' have begun. The vaccine is based on the same mRNA technology as the Pfizer-BioNTech COVID-19 vaccines. As part of this latest episode of BBC Radio 4's Inside Health programme, James Gallagher visits the Unit and speaks to Prof Anne Willis and Dr James Thaventhiran about 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.