This donor is sold out but it says more vials may become available in the future. Is there a way CCB can tell if a donor is willing to donate more. Does CCB put in requests to Donors that are in high demand? At what point does CCB classify a donor as no vials will become available vs. when it says more vials are expected to become available but no guarantee? Are the donors considered retired if a certain amount of time goes by without them donating or does the donor have to specifically advise CCB that they are no longer donating. A lot of questions, I know.