“…The Blood Transfusion Service of Baden-Württemberg (420,00 donations/year) introduced, in January 1997, the screening of plasma minipools (n = 96) by PCR for detection of HBV, HCV and HIV nucleic acids. From a previous study on larger plasma pools (n = 5,000) derived from this blood donor population, it was known that the introduction of anti-HCV screening had a positive effect on the viral safety of these pools [3]. PCR screening was introduced stepwise, beginning with the testing of blood donations collected by the blood transfusion institute in Ulm (~800 donations/day) in January 1997.…”