目的了解柳州市预防接种后儿童的免疫水平，为进一步做好免疫规划工作提供科学依据。
Objective To understand the change of immune status among children after preventive vaccination, provide scientific evidence for the work in the future.
目的了解柳州市预防接种后儿童的免疫水平，为进一步做好免疫规划工作提供科学依据。
Objective To understand the change of immune status among children after preventive vaccination, provide scientific evidence for the work in the future.
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