SynthesisEuro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin2021
Efficacy and effectiveness of COVID-19 vaccines against SARS-CoV-2 infection: interim results of a living systematic review, 1 January to 14 May 2021.
Synthesis in Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers, 11 of them syntheses 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
79 citing papers in PubMed, 11 syntheses or guidelines pooled it.
- A systematic review and meta-analysis of the global prevalence and determinants of COVID-19 vaccine acceptance and uptake in people living with HIV.Nature human behaviour · 2024Pooled it
- Long-term effectiveness of COVID-19 vaccines against infections, hospitalisations, and mortality in adults: findings from a rapid living systematic evidence synthesis and meta-analysis up to December, 2022.The Lancet. Respiratory medicine · 2023Pooled it
- The effect of COVID-19 vaccines on sperm parameters: a systematic review and meta-analysis.Asian journal of andrology · 2023Pooled it
- Efficacy and safety of COVID-19 vaccines.The Cochrane database of systematic reviews · 2022Pooled it
- Three out of four published systematic reviews on COVID-19 treatments were not registered and one-third of those registered were published: a meta-research study.Journal of clinical epidemiology · 2022Pooled it
- Risk factors affecting COVID-19 vaccine effectiveness identified from 290 cross-country observational studies until February 2022: a meta-analysis and meta-regression.BMC medicine · 2022Pooled it
- Duration of effectiveness of vaccines against SARS-CoV-2 infection and COVID-19 disease: results of a systematic review and meta-regression.Lancet (London, England) · 2022Pooled it
- Facing the Omicron variant-how well do vaccines protect against mild and severe COVID-19? Third interim analysis of a living systematic review.Frontiers in immunology · 2022Pooled it
- Pooled it
- Effectiveness of COVID-19 vaccines against SARS-CoV-2 infection with the Delta (B.1.617.2) variant: second interim results of a living systematic review and meta-analysis, 1 January to 25 August 2021.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2021Pooled it
- Systematic Review and Meta-Analysis of COVID-19 Vaccination Acceptance.Frontiers in medicine · 2021Pooled it
- Efficacy and safety of Chinese herbal medicine to prevent and treat COVID-19 household close contacts in Hong Kong: an open-label, randomized controlled trial.Frontiers in immunology · 2024Trial
- Patterns of COVID-19 mortality during the second and third waves in Sri Lanka: a cross-sectional study from a tertiary care center.BMC infectious diseases · 2026Article
- Retrospective neutralization analysis of SARS-CoV-2 variants in early pandemic sera.Frontiers in immunology · 2026Article
- COVID-19 vaccine hesitancy among Italian university students: Insights from history to shape the future.Human vaccines & immunotherapeutics · 2025Article
- Glycosylated SARS-CoV-2 RBD Antigens Expressed in Glycoengineered Yeast Induce Strong Immune Responses Through High Antigen-Alum Adsorption.Biomolecules · 2025Article
- Real-world impact of COVID-19 vaccination, household exposure, and circulating SARS-CoV-2 variants on infection risk and symptom presentation in a U.S./Mexico border community.Frontiers in public health · 2025Article
- The complexities of 'trust' in the context of COVID-19 vaccination choices among Black women in Alameda County, CA.Critical public health · 2025Article
- Vaccine Hesitancy and Associated Factors Amongst Health Professionals: A Scoping Review of the Published Literature.Vaccines · 2024Article
- Impact and Effectiveness of COVID-19 Vaccines Based on Machine Learning Analysis of a Time Series: A Population-Based Study.Journal of clinical medicine · 2024Article
19 more citing papers are in PubMed but not listed here.
Corrections and comments
- Commented on by
Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Evidence on COVID-19 vaccine efficacy/effectiveness (VE) in preventing asymptomatic SARS-CoV-2 infections is needed to guide public health recommendations for vaccinated people. We report interim results of a living systematic review. We identified a total of 30 studies that investigated VE against symptomatic and/or asymptomatic infection. In fully vaccinated individuals, VE against symptomatic and asymptomatic infections was 80-90% in nearly all studies. Fully vaccinated persons are less likely to become infected and contribute to transmission.
Indexed as
Identifiers
What Socratic 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 Socratic graph.