| Agent | Risk per Transfusion |
|---|---|
| HIV | 1:2,135,000 |
| HCV | 1:2,000,000 |
| HBV | 1:205,000 |
| HTLV I-II | 1:641,000 |
| West Nile Virus, T. cruzi (Chagas' Disease), Babesiosis, malaria, B. Burgdorferi (Lyme Disease), leischmania, CJD (Mad Cow Disease) | ?? but very low |
| Getting struck by lightning in any given year | 1:500,000 |
| Getting struck by lightning in a lifetime (80 years) | 1:6250 |
| Winning the Meg-Millions Jackpot | 1:175,711,536 |