Publication date: Sep 12, 2025
This study aimed to evaluate the vaccination status of the National Immunization Program (NIP) among children born in 2020-2021 in China and assess the impact of the COVID-19 pandemic on vaccination coverage. Three counties were randomly selected from each of the provinces of Zhejiang, Chongqing, and Shanxi in China. Vaccination records were retrieved from provincial immunization information systems. Statistical analyses were conducted using descriptive epidemiological methods and chi-square tests to compare vaccination coverage across different regions and birth cohorts. The Kaplan-Meier method was also applied to estimate vaccination coverage at specific ages. Except DTaP4, NIP vaccination coverage for children born in 2020-2021 remained high, exceeding the 90. 00 % target. Coverage ranged from 90. 09 % for PV3 (95 % CI, 90. 07-90. 47 %) to 99. 21 % for HepB1 (95 % CI, 99. 15-99. 27 %). However, compared to children born during 2015-2019, coverage for most vaccines (excluding BCG and HepB1) among those born in 2020-2021 significantly declined (all P-values
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| Concepts | Keywords |
|---|---|
| China | COVID-19 pandemic |
| Pandemic | National immunization program |
| Vaccination | Timeliness |
| Vaccination coverage | |
| Vaccine |
Semantics
| Type | Source | Name |
|---|---|---|
| disease | MESH | COVID-19 pandemic |
| drug | DRUGBANK | BCG vaccine |