Half of the world's population don't have access to essential healthcare, according to the World Health Organisation. And even in highly developed countries many still lose out. This week on People Fixing The World we hear about some ideas that aim to change that. We jump on board a hospital train that travels around South Africa providing affordable treatments to remote communities. And we step into a truck in a British supermarket car park, which is catching early cases of lung cancer when it’s much more treatable. People Fixing The World from the BBC is about brilliant solutions to the world's problems. We'd love you to let us know what you think and to hear about your own solutions. You can contact us on WhatsApp by messaging +44 8000 321721 or email [email protected]. And please leave us a review on your chosen podcast provider. Presenter: Myra Anubi Producer/reporter: Claire Bates South Africa reporter: Mpho Lakaje Editor: Jon Bithrey Sound mix: Andrew Mills