1. Introduction -- pt. I. Basic Principles of Asthma Epidemiology. 2. Study design options. 3. Study design issues -- pt. II. Asthma Morbidity. 4. Measuring asthma prevalence. 5. Measuring asthma morbidity. 6. Measuring asthma risk factors -- pt. III. Asthma Mortality. 7. Studying time trends in asthma deaths. 8. Studying the causes of asthma deaths