There is a good reason a lot of people are storing their own blood. BTW tainted blood is nothing new. Back in 1971 my mother was diagnosed with Chronic Serum Hepatitis due to a blood transfusion. This was when I was first getting interested in nutrition and she actually was able to restore health to her liver and lived another 38 years, but one thing about hepatitis - sooner or later it is likely to kill you, her's did return from dormancy and become liver cancer and killed her.