This week, we're taking a closer look at allergies. What causes them, and what makes them so hard to cure? Along the way we find out what it's like to live with severe allergy, why the body has evolved such a self-destructive system in the first place, whether, as some claim, caesarian delivery is linked to allergy risk, and how scientists are working on ways to blind the immune system to the things we react to to prevent allergy symptoms in future... Like this podcast? Please help us by supporting the Naked Scientists