Figure 2From: Prevalence and trends of markers of hepatitis B virus, hepatitis C virus and human Immunodeficiency virus in Argentine blood donors Positivity rates in screening test and NAT assays. In the years 2010 and 2011 75,200 samples were analyzed by screening test and NAT assays in two CABA transfusion centers. White bars: screening-positive test, gray bars: NAT-positive test.Back to article page