RHD and syphilis: The frequency rate of HbsAg and HCV were high in RhD + ve donors out of the total number of Rh + ve donors (0.39% and 0.14%) compared to RhD − ve donors out of the total number of Rh − ve donors (0.32% and 0.09%), while no differences were observed in the frequency rates of HIV and syphilis (Table 1).