<p>Dementia is now the UK’s leading cause of death - but could a vaccine one day help prevent it? New data from Wales suggests the shingles vaccine is linked to a 20% lower risk of developing dementia in later life, adding to evidence that viral infections can influence brain health.</p><p>Dr. Pascal Geldsetzer, Assistant Prof of Medicine at Stanford University discusses his findings and the further evidence required to prove this link, along with Prof Tara Spires-Jones, Group Leader in the UK Dementia Research Institute.</p><p>The UK has begun using the world’s first gonorrhoea vaccine - though it was originally developed for meningitis. With antibiotic-resistant strains increasing, we speak to Dr Suneeta Soni about why gonorrhoea has been so hard to target with vaccines.</p><p>At the Bristol Robotics Lab, engineers are creating devices to support mobility in older age. James meets Jonathan Rossner and tries out “The Right Trousers” - an inflatable exoskeleton designed to help people walk and to strengthen their muscles.</p><p>Presenter: James Gallagher Producers: Debbie Kilbride, Tom Bonnett &amp; Minnie Harrop Editor: Ilan Goodman Production coordinator: Ishmael Soriano This episode was produced in partnership with The Open University.</p>