In this episode of BBC’s Health Check, host Claudia Hammond seeks out experts who share everything on the human body to identify who’s likely to suddenly drop dead from undiagnosed heart problems and screens the risks through some form of cardiac tests to what’s going on inside the brain when we hear people laughing. Hammond discovers why one smoker might develop chronic lung disease while others don’t.

She also talks about what’s happening for the first week of July in London – the Final Week of Tennis Wimbledon, Annual Summer Exhibition from the Royal Society.

Download and listen to this episode by clicking on the image.