The Public Health Service The Public Health Service There's a lot of blood given in the US https://www.cdc.gov/bloodsafety/basics.html Blood Safety (CDC) http://www.cdc.gov/bloodsafety/basics.html 5 millones blood banks test ALL blood donations according to the Centers for Disease Control and Prevention. more stringent 14.6 million of them http://www.cdc.gov/bloodsafety/basics.html 5 million Americans 14.6 million of blood transfusions 14.6 million of them 14. 6 million of them 14.6 million of them