Objective To evaluate and control the potential risk of transmission of schistosomiasis,malaria and filariasis in the mobile population from provinces outside Shanghai.

• 目的评价外来流动人口对上海市人群传播血吸虫病、疟疾、丝虫病(简称“三病”)的潜在危害,从而预防和控制外源性“三病”在本市传播。