Hello! We were told to use diatomaceous earth in our house to rid it of fleas. I took precautions by wearing a mask when I put it all over our house, which is 4000 sq ft. I left it there for 3-4 days. During that time my 2 year old was running and playing all over the house and moved around all of the particles in the air. Well after that she started coughing and 7 months later she has been diagnosed with asthma. She was fine before this exposure. My concern is that she got this from inhaling all of that in our house. She is too young to have tests to check her lungs and her function but my concern is that she could have serious lung problems and have read that this can lead to tuberculous, cancer, and death. Do you know how serious this is? How many cases has there been. What can I do to help her! ? Thanks