Doctors hope work such as this could lead to revolutionary new ways to fight skin, bowel and other types of cancer.Patients taking Keytruda for advanced melanoma were less likely to die, or have the skin cancer reoccur, if they also had the jab, mRNA-4157/V940, Moderna and MSD said."It's shown a 44% relative reduction in the risk of dying of cancer or having your cancer progress.These results show the feasibility of making and delivering personalised vaccines to treat cancer, and that the vaccine can add benefit to current treatments.Consultant colorectal surgeon at the University of Birmingham Mr Andrew Beggs said: "Although early data, it is very encouraging that this is a likely effective treatment option in the future."