How Principles of epidemiology are being applied

Briefly summarize the epidemiologic differences among the three diseases and how principles of epidemiology are being applied—or could be applied—to address COVID-19.

• Are there any lessons learned from the use of epidemiology in the eradication of smallpox and polio that could be applied to COVID-19?
• Evaluate the benefits of addressing this health problem at the population level versus the individual level.