Neutralizing antibodies in 39 patients chronically infected with HCV, genotype 1, and treated with pegylated interferon/ribavirin.

NAb50-titer for each plasma sample against each genotype 1a and genotype 1b recombinant virus. The result is ordered according to treatment outcome, subtype and the NAb50-titer against DH6/JFH1 starting with the plasma sample with the lowest titer. NAb50-titer is the highest dilution where the plasma was able to neutralize 50% of the test culture virus.