Both the under-registration rate and the deviation in the date recorded in the ZJIIS versus the 2014 coverage survey showed an increasing trend for subsequent doses, but we could not explain this phenomenon using the available data, and we suggested that future research should be focused on identifying the specific reasons for this issue. 5.
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Evaluating Childhood Vaccination Coverage of NIP Vaccines: Coverage Survey versus Zhejiang Provincial Immunization Information System.
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