>No, the RH-s are a very rare set of the total population. If you need an "in kind" donation and are RH-, where do you look for a donor?
My mother is AB RH- She is not allowed to give blood at regular blood drives/mobiles. It goes to waste, basically. She is on a call list and if the need for her blood type comes up, she is contacted. It has only happened once that I know of, but it could have been more. She's pretty much got the most rare type/combo