health. - [julia] as a result, hutterite kidson't acquire the subsequent immunity training from this exposure. - the amish have about four percent asthma in their population, that's half the u.s. average, whereas the hutterites have a significant elevation in the disease rate. - [julia] with these dramatic finding jack's lab has been looking at ways that those of us who live in more sterile urban environments can bring thmicrobial diversity of the farm back to our bodies and our microbiomes. - we've got one strategy that we've been developing. we have living surface materials with bacteria that we could place in a home or a hospital even, and enable that home or hospital wall to have the beneficial properties of say, a farm. sounds a little bit science fictiony, but in the future, we may be able to build entire cities out of biologically alive materials, and maybe even spaceships. we work with nasa onrying to see if these materials could be beneficial for long term spacecraft missions to mars, for example. - oh, amazing, that is really interesting. on my journey towards a disease fre