Yahoo health: Apples are the second most popular fruit in America, according the Agricultural Marketing Resource Center. But apple contamination is rare because the fruit has a hard surface, which prevents bacteria from entering the fruit, says Doug Powell, PhD, a former professor of food safety in the U.S. and Canada who publishes

“Fresh fruits and vegetables are probably the biggest source of foodborne illness today in North America, and that’s because they’re fresh — we don’t cook them — so anything that comes into contact has the potential to contaminate,” Powell tells Yahoo Health.

Powell is especially careful with the following five fruits and vegetables, which have been linked to a significant number of foodborne illness outbreaks over the past few years. (And no, apples didn’t make the list.)

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