A vaccine designed to prime the body to recognise and fight cancer cells has shown it could stimulate the immune system to help treat the disease more effectively, according to the results of an early trial. Researchers described the results as “an important first step” in potentially developing a new treatment for people with advanced cancers. The jab, known as mRNA-4359 and developed by Moderna, is aimed at people with advanced melanoma, lung cancer and other solid tumour cancers. It uses mRNA technology, similar to Covid-19 vaccines, which teaches the immune system how cancer cells differ t…