Excerpt:

Although the risk of infection with hepatitis and human
immunodeficiency viruses from blood transfusions has been reduced
to negligible levels, emerging infections continue to offer
threats. Such threats occur with any infection that has an
asymptomatic, blood-borne phase. In the past, it was thought that
any emerging transfusion-transmitted disease would have
epidemiologic properties similar to those of AIDS or viral
hepatitis. Over the past 20 years, however, greatest concern has
arisen from variant Creutzfeldt-Jakob disease, West Nile virus,
and Babesia. These and other emerging infections are discussed in
the context of blood safety. Copyright (c)  2010 Elsevier Inc.
All rights reserved.