Before any donation takes place, you will be asked to fill out a detailed health questionnaire so that we can make sure early on that you are still suitable as a donor. You will then be asked for a blood sample, which will go for confirmatory typing. Your regular GP will be able to take the blood sample. Your blood will also be checked for other infections, such as HIV or hepatitis viruses. The results of your blood tests will be used to decide whether you really are the best match for the patient.