The Importance of Hygienic Conditions in the Modern Era

The bacteria that we have are very important for the development and education of our immune system. If you're born in a sterile environment, if you take a mouse that never has any bacteria, its immune system doesn't develop as well as one that is exposed to bacteria. Sheena Kruchshank: Being clean is better than not being clean and having less infections is better for you. Katie Hayler visits eight-year-old Dylan who was diagnosed with peanut allergy at 18 months old after he rubbed his eyes on peanuts. Pamela Ewan from Cambridge Peanut Allergy Clinic talks about why some allergies are so severe.