<unk>  were a serious public health problem in the late 1970s up to 1985. These<unk>  caused large numbers of<unk> cs to become infected with HIV and hepatitis C. The companies involved included Alpha Therapeutic Corporation, Institut Mérieux (which then became Rhone-Poulenc Rorer Inc., and is now part of Sanofi), Bayer Corporation and its Cutter Biological division, Baxter International and its Hyland Pharmaceutical division. Estimates range from 6,000 to 10,000<unk> cs in the United States becoming infected with HIV. Factor VIII is a protein that helps the clotting of blood, which<unk> cs, due to the genetic nature of their condition, are unable to produce themselves. By injecting themselves with it,<unk> cs can stop bleeding or prevent bleeding from starting; some use it as often as three times a week.
Contaminated haemophilia blood products
Serious Hazards of Transfusion
Vitamin K deficiency bleeding
Young blood transfusion
Trauma in children
Antibiotic use in livestock
Infected blood scandal 
Cold autoimmune hemolytic anemia