| Obligatory | Must not donate. |
| See if Relevant | |
| Additional Information | HTLV (Human T Cell Lymphotropic Virus I and II) infection can cause serious blood and nervous system disease. It is known to be transmitted by transfusion. In the early stages of infection the testing used by the Blood Services may not detect the virus allowing it to be passed on by transfusion. |
| Information | This is a requirement of the Blood Safety and Quality Regulations 2005. |
| Reason for change | See below |