Based on HCV antibody status, there was highly significant evidence for intra-familial clustering of HCV infections, especially among father-offspring, mother-offspring, and sib-sib pairs.
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The sentences
Conversely, the genetic distances between strains infecting two subjects who have been exposed to stitching, blood transfusion, or tooth filling or extraction were significantly higher than in those not sharing these risk factors (the difference was marginally significant for abortion).