The standard duration of pegylated interferon/
ribavirin alone is 48 weeks
for people with genotype 1 and 24 weeks
for those with genotypes 2 or 3.
NEUTRINO enrolled 327 previously untreated chronic hepatitis C patients with HCV genotypes 1, 4, 5, and 6. These genotypes have traditionally been considered "hard to treat," but as several studies at the congress showed, all may not be equally difficult, just as genotypes 2 and 3 are not equally "easy to treat".