Located at the Yantai Muping area Gaoling town Yuangezhuang village.

位于烟台市牟平区高陵镇院格庄村。

To study the dynamic changes trend of Hepatitis A in Gaoling County of Shaanxi Province.

目的了解陕西省高陵县甲型病毒性肝炎动态变化趋势。