The Healthy Homes Network will recruit participants from community physicians and clinics, and organizations affiliated with the HHN including health departments and housing authorities, the CMH Emergency Room, the CMH Allergy Clinic, other CMH primary care clinics. HHN will recruit through advertising in the media if necessary (see proposed ad included), but the CMH name or LOGO will not appear in the ad. Subjects will be referred to CMH for health evaluations.