Emerging infectious agents and the nation's blood supply: responding to potential threats in the 21st century.

This collaboration had a highly significant impact and the number of recognized transfusion‐transmitted WNV cases shrank from 23 to 6 from 2002 to 2003, compared with 4156 and 9862 vector‐borne infections reported to CDC, respectively. 19 , 20 More than 700 viremic donations were interdicted during the first year of testing, and approximately 60,000 frozen blood products from high‐incidence areas were withdrawn. 21 , 22 Since then, a large number of WNV‐positive blood donations have been identified, primarily through minipool NAT.

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