Passage: Tests selected to screen donor blood and tissue must provide a high degree of confidence that HIV will be detected if present (that is, a high sensitivity is required). A combination of antibody, antigen and nucleic acid tests are used by blood banks in Western countries. The World Health Organization estimated that, as of 2000, inadequate blood screening had resulted in 1 million new HIV infections worldwide.In the US, the Food and Drug Administration requires that all donated blood be screened for several infectious diseases, including HIV-1 and HIV-2, using a combination of antibody testing (EIA) and more expeditious nucleic acid testing (NAT). These diagnostic tests are combined with careful donor selection. As of 2001, the risk of transfusion-acquired HIV in the US was approximately one in 2.5 million for each transfusion.

Question: what was the rate of HIV being transfusion-acqiured  IN 2001 in the US?
one in 2.5 million