To evaluate the examination of weak positive HBsAg in hepatitis B virus (HBV) . Of the 80 patients with weak positive HBsAg of HBV and 95 healthy persons which served as control. Fasting blood was collected and serum were measured on day by ELISA, PCR, the examination of CIC (circle immune complex) . Among the 80 patients, the positive number of PCR, ClC were 5, 27 respective. It has little pathogenicity, on the contrary, with the serve infection of HBV or subtypes in HBV, the situations of the patients may become worse or suffer from cancers.
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