| China CDC | Chinese Center for Disease Control and Prevention |
| NIP | China’s National Immunization Program |
| VCR | Vaccination Coverage Rate |
| PDCDC | Shanghai Pudong New Area Center for Disease Control and Prevention |
| SIPIS | Shanghai Immunization Planning Information System |
| ORs | Odds Ratios |
| CIs | Confidence Intervals |
| WHO | The World Health Organization |
| CHSCs | Community Health Service Centers |
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