Previous studies found that in the older group (≥ 40), HCV-1b and 2a were the predominant subtypes, while in the younger group, the proportion of HCV-6 and 3 showed an increasing trend with drug use or high-risk sexual behavior by young people [ 42 , 43 ].
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Hepatitis C virus genotype/subtype distribution and evolution among Chinese blood donors: Revealing recent viral expansion.
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