Can Extracted Hairs Regrow in Donor Area?

Can hair ever grow back in the donor areas from which follicular units have been extracted? (Similarly, would hair ever grow back if I combed out a follicle?) I assume follicles don’t regenerate.

When hair is extracted with Follicular Unit Extraction techniques (FUE) the root and growth center of the hair is removed and relocated, so it will never grow back. If the hair is pulled out, the root is always left behind, so that it will always regrow.

You are born with an average of 100,000 hairs. When they are moved, the number will remain at 100,000 (minus whatever you’ve lost from genetic balding) if they are not damaged with the move. In the hands of a good hair transplant doctor, moving hair around is just a relocation process.