Most skin cancers are associated with ultraviolet (UV) radiation from the sun or from tanning beds, says Dr. Perez. Yes, darker skin produces more of the pigment called melanin that does help protect skin — but only to a certain extent. read more
So yes, some black-skinned people have more immunity to some diseases than some white-skinned people do. And some white-skinned people have more immunity to some diseases than some black-skinned people do. Immunity isn't linked to melanin (except immunity from sun poisoning and some diseases caused by too much solar expsure). read more