SynthesisHuman vaccines & immunotherapeutics2025
Safety of co-administration of injectable vaccines in individuals under 18 years of age: A systematic literature review.
Synthesis in Human vaccines & immunotherapeutics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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
4 citing papers in PubMed.
- Structured Pharmacist-Led Vaccine Recommendation and Coadministration in Community Pharmacies: Real-World Evidence from Poland.Vaccines · 2026Article
- Review
- Review
- Surveillance and analysis of adverse events following immunization (AEFI) with measles, mumps, and rubella (MMR) vaccine in Zhejiang Province, China, 2020-2025.Frontiers in public health · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
14 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Co-administration of multiple vaccines during a single clinical visit is common in pediatric immunization programs, but administering three or more injections simultaneously has raised safety concerns. This systematic review, conducted in 2023, assessed the safety of administering three or more vaccines at the same time compared with giving fewer or the same vaccines across separate sessions. Data from 26 studies were analyzed using random-effects meta-analyses. The risk of any adverse event (AE) was modestly increased (OR ≈ 1.54), mainly due to expected and transient reactions such as fever, irritability and injection-site pain. Importantly, there was no significant increase in serious adverse events (SAEs) (OR 1.07, 95% CI 0.92-1.25). Differences in systemic (OR 1.19, 95% CI 0.95-1.50) or local AEs (OR 1.37, 95% CI 0.85-2.22) were not statistically significant. These findings support the continued co-administration of multiple vaccines in pediatric programs, providing a nuanced safety profile for policymakers and clinicians.
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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.