Methods According to the MOH/UNICEF Project,immunization status was investigated in 5039 children of floating population in 3 selected areas by field survey.

• 方法按照卫生部和联合国儿童基金会合作项目的要求,对3个项目县2003~2005年的5039名外来流动儿童的免疫状况进行现场调查。