Giving blood saves lives and in the UK we rely upon volunteers to continuously provide us with this precious resource, not only treat people in emergency situations but for long and short term medical benefits. Have you ever given blood and do you know how many donors we need to maintain our supply? How can we make sure our blood is safe, who is eligible and what is the criteria is for donating? This section refers to donor recruitment, selection and safety as well as looking into the history of donation. There is also a link to a blood centre tour where you can follow the journey of a blood donation from the donor to the patient.