Reacted after she decided to conduct an experiment where she didn t shower for a month. turns out she may have been on something. as we learned of a new study that reveals being too clean is not always a good thing. johns hopkins childrens center did a study recently on cleanliness. con you had concluded keeping your home too clean may make your children susceptible to allergies and asthma later in life. we have a pediatrician at st. lou s hospital. she is mother of five which we appreciate and she gives us medical advice and practical advice as well. doctor, nice to see you again. thank you so much for having me, jenna. jenna: start with this the hygiene hypothesis. it says if your children are exposed not just to dirt but roaches, rodents, cats, in their first year of life, that they will actually be healthier. what do you make of it? it is very true. actually this study supports findings of many other previous studies, that exposure to these antigens, these germs, really,