Blood donors
We randomly collected plasma samples from 2972
accepted volunteer donors at the Nanjing Red Cross
Blood Center between February 2007 and April 2008.
Each sample was not directly collected from the donor,
but collected from one tubing segment connected to the
bag of the donor’s blood; each tubing segment was cut
with a fresh blade to avoid cross-contamination among
samples. According to the policy set up by the China
Health Ministry, an accepted donor is defined as a generally
healthy person with normal alanine aminotransferase
(ALT), negative for HBsAg and antibodies against
hepatitis C virus (HCV), HIV, and treponema pallidum.
Thus, the laboratory tests in all the 2972 donors showed
to be normal ALT and negative for HBsAg, anti-HCV,
anti-HIV, and antibody against treponema pallidum; the
HBsAg in each donor was tested in parallel by two different
commercial enzyme-linked immunosorbent assay
(ELISA) kits.
Blood donorsWe randomly collected plasma samples from 2972accepted volunteer donors at the Nanjing Red CrossBlood Center between February 2007 and April 2008.Each sample was not directly collected from the donor,but collected from one tubing segment connected to thebag of the donor’s blood; each tubing segment was cutwith a fresh blade to avoid cross-contamination amongsamples. According to the policy set up by the ChinaHealth Ministry, an accepted donor is defined as a generallyhealthy person with normal alanine aminotransferase(ALT), negative for HBsAg and antibodies againsthepatitis C virus (HCV), HIV, and treponema pallidum.Thus, the laboratory tests in all the 2972 donors showedto be normal ALT and negative for HBsAg, anti-HCV,anti-HIV, and antibody against treponema pallidum; theHBsAg in each donor was tested in parallel by two differentcommercial enzyme-linked immunosorbent assay(ELISA) kits.
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