Table 1 Relative Risk of the most frequent TTI
| Risk factor/infectious agent | Risk of TTI in blood products released | Ref. | ||
|---|---|---|---|---|
| U.S. | Europe | |||
| Virus | ||||
| HIV | 1 in 2,135,000 | 1 in 909,000 – 5,500,000 | 26, 30, 33 | |
| HCV | 1 in 1,930,000 | 1 in 2,00,000 – 4,400,000 | 26, 30, 33 | |
| HBV | 1 in 277,000 | 1 in 72,000 – 1,100,000* | 33 | |
| WNV | 1 in 350,000 | No reported cases | 56, 63 | |
| HTLV-II | 1 in 2,993,000 | Not tested | 30 | |
| Bacteria | ||||
| Bacterial contamination | RBC | 1 in 38,500 | 8, 10 | |
| Platelets | 1 in 5,000 | 13 | ||
| Parasites | ||||
| Malaria | 1 in 1,000,000 – 5,000,000 | 105 | ||