Foodborne illnesses are on the rise in the US. CNN wellness expert Dr. Leana Wen looks at the most common causes of foodborne infections and how to improve food safety practices.

Even so, foodborne illnesses like E. coli and listeria have sickened hundreds of Americans this year and some have died. And experts say trying to spot patterns in food safety is a tricky business.

Foodborne illnesses are on the rise in the US. CNN wellness expert Dr. Leana Wen looks at the most common causes of foodborne infections and how to improve food safety practices.