The North Carolina Department of Health and Human Services has confirmed man from Cary died from Vibrio vulnificus, apparently linked to raw oysters.

The Center for Disease Control says it is impossible to tell that an oyster is bad by looking at it.

“An oyster that contains harmful bacteria doesn’t look, smell, or even taste different from any other oyster,” the CDC’s website says.

Most Vibrio infections can be prevented by ensuring your seafood is thoroughly cooked, especially oysters.