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Pre-existing antiviral-resistant hepatitis B virus (HBV) has been associated with primary non-response to lamivudine treatment in patients with chronic hepatitis B, but little is known of the capacity for resistant HBV to cause primary infection.The study was to investigate if Beijing patients with acute hepatitis B (AHB) are infected with drug-resistant HBV.Sera were collected from 201 NA-untreated...
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