Graphics and drama combine to reveal more of the hidden workings of the human body. In this weeks Body Story we discover how our bodies turn against us to give us allergies – and even threaten our lives. A simple wasp sting triggers cells throughout Phoebes skin to make her fatally allergic to wasps. When shes stung again on a Florida beach holiday Phoebes body mounts one of its most primitive and powerful chemical defences one that could kill her in minutes. As she goes into anaphylactic shock she starts to swell up her airways shut down and her heart falters. Her only hope is urgent hospital treatment – if she can get her there in time.