Possible Duplicate:
Using “are/is” after a list with “and/or”
My company's website recently received an E-mail stating there was a grammatical error in our greeting message. The sentence in question is as follows: "If you, a family member, or a friend is physically or mentally disabled, unable to work, and needs help navigating through the Social Security disability system, we are here to help you!" If you were only paying attention to the last item in the list then "is" would be okay, but since it's mixed in with "you" it gets a bit confusing.