can mold and mildew make you real bad sick . my father inlaws house is falling in. it is covered in mold and mildew. the ceilings, walls and floor you have to use a mask to breath. we didnt know how bad it was intill he called us to take him to the hospital. he was having a hard time breathing. when i went in the house i thought i was going to fall out! we are now moving his stuff out of the house. while he is still in the hospital. we told him he can not go back to that house. he is in icu. with pneumonia