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作者在208,000名志愿献血员中,检查出有乙型肝炎抗原(HBAg)者319人,其检出率为1.5‰。对其中210人进行了长期追踪观察(最长达20个
Of the 208,000 volunteer blood donors, 319 were diagnosed with hepatitis B antigen (HBAg) and the detection rate was 1.5 ‰. 210 of them were followed up for a long time (up to 20