Appendix 1

- Prevalence (%)* of screened and confirmed transfusion-transmittable infection (TTI) markers among 375,218 potential blood donors in Saudi Arabia, 2020.

Serological parameterNumber of reactive blood donors (%)*Prevalence of confirmed TTI per 100,000 donors
ScreenedConfirmed
HBsAg3,460 (0.92)880 (0.23)234.5
Anti-HBc20,550 (5.47)4,443 (1.18)1,184.1
Anti-HCV1,376 (0.36)390 (0.10)103.9
Anti-HIV-1/2712 (0.19)68 (0.01)18.1
Anti-HTLV I/II644 (0.17)131 (0.03)34.9
Syphilis1,500 (0.40)471 (0.12)125.5
Malaria1,825 (0.48)8 (0.002)2.1
Total30,0676,391
Molecular testing
HBV NAT2,424 (0.65)1,931 (0.51)514.6
HCV NAT178 (0.04)105 (0.02)27.9
HIV NAT89 (0.02)39 (0.01)10.3
Total2,6912,075

*Percentage of total donors.