Evidence map›Paper›PMID 41150420›Full record

ArticleVaccines2025

Economic Inequalities in Immunization Coverage Among One-Year-Olds and Coverage Gains from Closing the Inequality Gap in 10 Low- and Middle-Income Countries in the Western Pacific Region, 1994-2021.

Ana Mendez-Lopez, Roland Dilipkumar Hensman, Shanlong Ding, Kidong Park

Abstract read
In one paragraph

Article in Vaccines, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Ana Mendez-LopezDivision of Data, Strategy, and Innovation, World Health Organization Regional Office for the Western Pacific, Manila 1000, Philippines.ORCID 0000-0002-8831-1684
Roland Dilipkumar HensmanDivision of Data, Strategy, and Innovation, World Health Organization Regional Office for the Western Pacific, Manila 1000, Philippines.
Shanlong DingDivision of Data, Strategy, and Innovation, World Health Organization Regional Office for the Western Pacific, Manila 1000, Philippines.
Kidong ParkDivision of Data, Strategy, and Innovation, World Health Organization Regional Office for the Western Pacific, Manila 1000, Philippines.ORCID 0000-0002-1719-5911

Funding

World Health Organization 001
6 · The paper itself

Abstract

backgroundImmunization coverage has increased substantially in the Western Pacific Region, saving millions of lives and supporting disease elimination efforts. However, gaps in coverage and inequitable vaccine access persist, leaving millions unvaccinated. Wealth-based inequalities remain a critical barrier to achieving equitable immunization coverage and maximizing the health benefits of vaccination programs.

methodsWe analyzed full immunization coverage among 1-year-olds in 10 middle-income countries of the Western Pacific Region using data from the WHO Health Inequalities Data Repository. National and wealth quintile-specific coverage rates and within-country inequalities were assessed using absolute and relative measures (difference, ratio, slope index of inequality, and relative index of inequality). Trends over time were examined in countries with longitudinal data (

findingsSubstantial gaps in immunization coverage persist across all countries studied (

conclusionsAddressing wealth-based inequalities in immunization could drive substantial gains in national coverage across the Western Pacific Region. Sustained, equity-oriented approaches are essential to achieving universal vaccine access and ensuring no population is left behind. Inequality patterns can guide equity-focused policies to reach underserved and disadvantaged populations.

Indexed as

immunization inequalitiesmonitoringWestern Pacific Region

Identifiers

PMID41150420
PMCPMC12567940

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.