Shingles vaccine delays dementia, and chatting AI bots

This week, we examine a herpes zoster vaccination that can reduce or delay dementia diagnosis. How does it work? Plus, the BBC's Zoe Kleinman explains a social media site for AI chatbots, the discovery of microplastics in remote parts of the Pacific Ocean, and why the Artemis II launch has been delayed once more... Like this podcast? Please help us by supporting the Naked Scientists