The major challenge facing the modern world of vaccines is to get them to people right at the end of the line – those people who still don’t have access to effective treatment. It’s not always remote villages way out in the country, it can also be communities in some of the world’s massive slums. The problem is vaccines tend to be complex and sophisticated medicines. Many involve skilled disease diagnoses, difficult delivery systems like cold chains, trained staff to administer them and the complex follow-ups and monitoring systems. This film looks at the physical difficulties and costs of getting vaccines to people in remote or forgotten places and people stuck in the middle of wars. The film follows Julian Lob-Levyt, head of the Global Alliance for Vaccines and Immunisation, on a field trip to Africa as he follows the journey of a consignment of vaccines from arrival to injection.