Elizabeth Cohen Explains

Senior medical correspondent Elizabeth Cohen breaks down complicated health choices and confusing medical questions into fun and informative graphics that lead you to the answers you need.

Allergist Dr. Dean C. Mitchell, a clinical assistant professor at Touro College of Osteopathic Medicine in New York, contributed to this chart.

This flowchart series is designed to help educate people about medical issues so they make better informed decisions about their health. Please consult a doctor for any serious symptoms or for conditions specific to your personal health.