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甲型肝炎 (甲肝 )在我国农村儿童中常发生周期性流行。前瞻性研究表明 ,当农村儿童甲肝易感率5 0 %时 ,若有传染源进入 ,则可发生爆发或流行。为监测农村儿童甲肝易感率 ,我们于 1998年 9月选择平山县一村庄 4～ 6岁儿童检测血清甲肝抗体 (抗-ＨＡＶ)。 1999年 9月～ 2 0 0 0
Hepatitis A (hepatitis A) is a cyclical epidemic in rural children in our country. Prospective studies have shown that when a rural child susceptibility to hepatitis A 50%, if the source of infection, you can have an outbreak or epidemic. In order to monitor the susceptibility of hepatitis A in rural children, we selected serum antibodies to hepatitis-A (anti-HAV) from 4 to 6 years old in a village of Pingshan County in September 1998. September 1999 ~ 2000