Previous population health studies suggest that up to 10% of Canadian adults have undiagnosed asthma or COPD- these people are currently undiagnosed and untreated, even though they may have significant respiratory symptoms. Our study will use targeted casefinding to find people with undiagnosed asthma and COPD in Canadian communities. The investigators will assess their symptoms and their health care use and number of sick days to determine the burden of undiagnosed respiratory disease in these people. The investigators will then determine whether early treatment of previously undiagnosed airflow obstruction will improve patients' health outcomes.