We investigated the relation between the presence of IgM antibodies to hepatitis C virus (HCV) and serotypes of HCV, in particular when a high level of IgM antibodies are present in patients infected with HCV serotype I and may be associated with the source, duration and evolution of infection. The study involved two anti-HCV positive groups with chronic liver disease from the same area, one of which was a group of haemodialysis patients attending the same haemodialysis centre.
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