“…Adverse reactions ratio was 7 times lower in our study than in the pilot phase (2.1 versus 16.1 cases per 1,000 units). In Morocco and Tunisia, the ratio varied from 0.5 to 1.6/1,000 [7, 19] and from 0.59 to 2.19/1,000 blood units [20], respectively. In Namibian, Zimbabwean, and South African systems, these ratios were, respectively, 0.8, 0.46, and 0.82 per 1,000 blood units [18, 21, 22].…”