Again, thank you for your help!
Thank you for your prompt response! If you don't mind indulging me one more question. I just checked my son's mouth and he does have a small cut on the inside of his cheek. He said he doesn't remember biting himself so I assume it isn't too recent. Would having the cut make any difference transmission wise?
Your son was never at risk of contracting HIV from eating popcorn even it has blood on it. HIV is unable to reproduce outside its living host (unlike many bacteria or fungi, which may do so under suitable conditions), except under laboratory conditions; therefore, it does not spread or maintain infectiousness outside its host.
HIV is transmitted by;
Unprotected penetrative anal and/or vaginal sex
Sharing works with other IV drug users
Mother to child