ArticleVaccines2023
New Vaccine Introductions in WHO African Region between 2000 and 2022.
Article in Vaccines, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled 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.
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.
Who cites it
7 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Prevalence of missed opportunities for vaccination (MOV) indicators among children aged 12-23 months in sub-Saharan African countries: An individual-level meta-analysis of DHS and MICS national household data surveys.Human vaccines & immunotherapeutics · 2025Pooled it
- Trial
- A Cross-Sectional Study to Understand COVID-19 Vaccine Hesitancy Among Nursing Students and Health Workers: Implications for Future Outbreak Preparedness in South Africa.International journal of environmental research and public health · 2026Article
- Organisation of health services for the delivery of primary health care in the WHO African region: a future perspective.The Lancet. Primary care · 2026Review
- Review
- Implementation science capacity building for immunization stakeholders in Africa: benefits and way forward.The Pan African medical journal · 2025Article
- Fifty years of immunization in Africa: reflecting on the past, celebrating progress, and shaping the future.The Pan African medical journal · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
Abstract
Significant progress has been made in vaccine development worldwide. This study examined the WHO African Region's vaccine introduction trends from 2000 to 2022, excluding COVID-19 vaccines. We extracted data on vaccine introductions from the WHO/UNICEF joint reporting form for 17 vaccines. We examined the frequency and percentages of vaccine introductions from 2000 to 2022, as well as between two specific time periods (2000-2010 and 2011-2022). We analysed Gavi eligible and ineligible countries separately and used a Chi-squared test to determine if vaccine introductions differed significantly. Three vaccines have been introduced in all 47 countries within the region: hepatitis B (HepB),
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What OpenQuestion holds
Registered trials
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.