Our country started the action of immunization programe in 1978, and then started the EPI activity in 1981. The Shandong Province also started the work followed the national EPI activity, and obtained a remarkable achievement in the past 20 years.

• 我国于1978年开始实施计划免疫，1981年开始推广EPI活动。 山东省计划免疫工作与全国EPI活动同步进行，近20年来取得了显著成就。