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Routine Vaccination Coverage - Worldwide, 2020
MMWR. Morbidity and Mortality Weekly Report
|October 28, 2021
Summary
Global vaccination coverage declined in 2020 due to the COVID-19 pandemic, increasing the number of unvaccinated children. Targeted strategies are crucial to recover lost ground and reach zero-dose children for immunization.
Area of Science:
- Global Health
- Immunology
- Vaccinology
Background:
- The Immunization Agenda 2030 (IA2030) aims to reduce vaccine-preventable diseases globally.
- This report updates vaccination coverage estimates and trends as of 2020.
Purpose of the Study:
- To assess changes in vaccination coverage in 2020 compared to 2019.
- To analyze the impact of the COVID-19 pandemic on immunization rates.
- To identify trends in unvaccinated and undervaccinated children.
Main Methods:
- Analysis of global, regional, and national vaccination coverage estimates for 2019 and 2020.
- Focus on key vaccines including diphtheria, tetanus, pertussis (DTP), polio, and measles-containing vaccines (MCV1).
- Comparison of vaccine doses administered and numbers of unvaccinated children.
Main Results:
- Global DTP3 and Pol3 coverage decreased from 86% (2019) to 83% (2020).
- MCV1 coverage dropped from 86% (2019) to 84% (2020).
- 22.7 million children missed DTP3 in 2020, an increase from 19.0 million in 2019, with zero-dose children comprising 75% of this group.
Conclusions:
- COVID-19 pandemic caused significant disruptions to immunization programs in 2020.
- A substantial increase in zero-dose children necessitates targeted interventions.
- Recovery requires context-specific strategies to catch up on missed vaccinations and strengthen immunization systems.
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