exactly what WOULD happen if someone else's hair was grafted in to my head?

[2016]

If there is an MD who can answer this question, that would be great! If you answer these questions below, please tell me what your health care background is. Thanks.

If someone else's hair was grafted in to the top of my head, would the hair just not grow? Would it just fall out? Would each place where a follicle was attached to my scalp become red and infected? Would I get a fever?

Or what about grafting artificial hair in to the top of my head: what would happen then.

Thanks.