Most people can.
You will be temporarily deferred if you have acute symptomatic flu, cold, or upper respiratory infection, have had close contact with a person with hepatitis in the last 12 months, have an active infection requiring medication, have been pregnant within the last 6 weeks, have traveled to a malarial zone in the last 12 months, if tests indicate your red cell level is too low or if you have been tattooed within the last 12 months. 450 ml. or 1 pint. You will feel a slight pinch when the needle is inserted. Most people do not find this uncomfortable. Your donation helps save lives .