From UNC’s The Daily Tar Heel:
“We find that when students come to orientation, you know, before they start classes at Carolina. About half of the students say that they want to be biology majors and go to med school,” May said. “But what we know is biology graduates about 500 majors a year out of a class of 4,000. So that means something happens.”
You can consider UNC to definitely be a weed-out school for premed.