The Blood Capitalists never give up. A new blood-borne disease would be unknown to clinicians, therefore untestable in the blood supply. There is no test for the "unknown". Needle-using junkies are major sellers of blood and always have been. There is no accurate test for "junkies" either. The buying of blood is the entire cause for the tainted blood which caused such misery a few decades ago. A hidden danger is the free passage of blood across the US/Canada border; blood is commonly bought in the US, very often bought from needle-users and traded in time of need across the border.