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作者在塞内加尔乙型肝炎和肝癌的高发区对49名3～24月龄的HBsAg阳性儿童注射灭活乙型肝炎疫苗,研究乙型肝炎疫苗对HBsAg阳性儿童的作用。
In Senegal, high-risk areas for hepatitis B and hepatocirrhosis, 49 HBsAg-positive children aged 3 to 24 months were injected with an inactivated hepatitis B vaccine to study the effect of the hepatitis B vaccine on HBsAg-positive children.