Screening procedures vary based on the process of MPHO donation. In the case of living donors such as blood, bone marrow, tissue, gametes or organs, the medico-social history is obtained from the donors themselves. In the case of deceased donors, the next of kin is interviewed concerning the medical/social history of the donor; which is less sensitive and effective in eliciting a history that might exclude the donor. Studies of seroprevalence comparing these donors with blood donors have demonstrated a significantly higher risk of this donor being in the window period for transmission of HIV and hepatitis viruses (15; 16).