Evidence map›Paper›PMID 32223757›Full record

SynthesisBMC infectious diseases2020

Effect of age at vaccination on the measles vaccine effectiveness and immunogenicity: systematic review and meta-analysis.

Sara Carazo, Marie-Noëlle Billard, Amélie Boutin, Gaston De Serres

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC infectious diseases, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
4.2field-weighted citation impact, top 5% of its field
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

23 citing papers in PubMed, 46 citations in OpenAlex.

  1. Observational
  2. Review
  3. Article
  4. Observational
  5. Investigation of a measles outbreak in a highly vaccinated middle school, France, 2023.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2025
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  8. Article
  9. Review
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  11. Article
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  18. Review
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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 at 2 institutions in 1 country.

Sara CarazoDepartment of Social and Preventive Medicine, Laval University, 1050, Avenue de la Médecine, Quebec, QC, G1V 0A6, Canada.
Marie-Noëlle BillardCHU de Québec - Université Laval Research Center, 2400, Avenue d'Estimauville, Quebec, QC, G1E 7G9, Canada.
Amélie BoutinCHU de Québec - Université Laval Research Center, 2400, Avenue d'Estimauville, Quebec, QC, G1E 7G9, Canada.
Gaston De SerresDepartment of Social and Preventive Medicine, Laval University, 1050, Avenue de la Médecine, Quebec, QC, G1V 0A6, Canada. gaston.deserres@inspq.qc.ca.ORCID http://orcid.org/0000-0002-1592-5167
Université Laval · CAInstitut National de Santé Publique du Québec · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe objectives of this review were to evaluate the effect of age at administration of the first dose of a measles-containing vaccine (MCV1) on protection against measles and on antibody response after one- and two-dose measles vaccinations.

methodsWe conducted a systematic review of the PubMed/MEDLINE, Embase, Web of Science and Cochrane databases (1964-2017) to identify observational studies estimating vaccine effectiveness and/or measles attack rates by age at first vaccination as well as experimental studies comparing seroconversion by age at first vaccination. Random effect models were used to pool measles risk ratios (RR), measles odds ratios (OR) and seroconversion RR of MCV1 administered at < 9, 9-11 or ≥ 15 months compared with 12 or 12-14 months of age.

resultsWe included 41 and 67 studies in the measles protection and immunogenicity analyses. Older age at MCV1, from 6 to ≥15 months, improved antibody response and measles protection among one-dose recipients. Pooled measles RR ranged from 3.56 (95%CI: 1.28, 9.88) for MCV1 at < 9 months to 0.48 (95%CI: 0.36, 0.63) for MCV1 at ≥15 months, both compared to 12-14 months. Pooled seroconversion RR ranged from 0.93 (95%CI: 0.90, 0.96) for MCV1 at 9-11 months to 1.03 (95%CI: 1.00, 1.06) for MCV1 at ≥15 months, both compared to 12 months. After a second dose, serological studies reported high seropositivity regardless of age at administration of MCV1 while epidemiological data based on few studies suggested lower protection with earlier age at MCV1.

conclusionsEarlier age at MCV1 decreases measles protection and immunogenicity after one dose and might still have an impact on vaccine failures after two doses of measles vaccine. While two-dose vaccination coverage is most critical to interrupt measles transmission, older age at first vaccination may be necessary to keep the high level of population immunity needed to maintain it.

Indexed as

Immunization ScheduleAgedAge FactorsHumansInfantMeaslesMeasles VaccineObservational Studies as TopicOdds RatioMeasles VaccineAgeEffectivenessImmunogenicityMeasles vaccine

Identifiers

PMID32223757
PMCPMC7104533
OpenAlexW3013227458

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.