HCV genotype 4 should be considered as "difficult to treat". The better results of therapy in other geographical areas (Middle East) may be due to a different distribution of the subtypes of HCV genotype 4.
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. This record was last updated on 07/03/2016 and may not reflect the most current and accurate biomedical/scientific data available from NLM. The corresponding record at NLM can be accessed at https://www.ncbi.nlm.nih.gov/pubmed/18563977