ArticleNature communications2021
Serological responses and vaccine effectiveness for extended COVID-19 vaccine schedules in England.
Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 75 papers, 3 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
75 citing papers in PubMed, 3 syntheses or guidelines pooled it, 112 citations in OpenAlex.
- Effectiveness of COVID-19 vaccines against SARS-CoV-2 infection and severe outcomes in adults: a systematic review and meta-analysis of European studies published up to 22 January 2024.European respiratory review : an official journal of the European Respiratory Society · 2025Pooled it
- Prior infections and effectiveness of SARS-CoV-2 vaccine in test-negative studies: a systematic review and meta-analysis.American journal of epidemiology · 2024Pooled it
- Vaccine efficacy against SARS-CoV-2 for Pfizer BioNTech, Moderna, and AstraZeneca vaccines: a systematic review.Frontiers in public health · 2023Pooled it
- A Phase 2 Clinical Trial to Evaluate the Safety, Reactogenicity, and Immunogenicity of Different Prime-Boost Vaccination Schedules of 2013 and 2017 A(H7N9) Inactivated Influenza Virus Vaccines Administered With and Without AS03 Adjuvant in Healthy US Adults.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2024Trial
- Antibody persistence of standard versus double three-dose hepatitis B vaccine in liver transplant children: a randomized controlled trial.Scientific reports · 2024Trial
- The immunogenicity of an extended dosing interval of BNT162b2 against SARS-CoV-2 Omicron variant among healthy school-aged children, a randomized controlled trial.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2023Trial
- Alternative strategies to increase the immunogenicity of COVID-19 vaccines in kidney transplant recipients not responding to two or three doses of an mRNA vaccine (RECOVAC): a randomised clinical trial.The Lancet. Infectious diseases · 2023Trial
- Effect of priming interval on reactogenicity, peak immunological response, and waning after homologous and heterologous COVID-19 vaccine schedules: exploratory analyses of Com-COV, a randomised control trial.The Lancet. Respiratory medicine · 2022Trial
- Assessment of human immunity to A/H3N2 influenza subclade K during 2025 emergence.EBioMedicine · 2026Article
- Longitudinal analysis of neutralizing antibodies against SARS-CoV-1 and different SARS-CoV-2 strains in breakthrough and unvaccinated COVID-19 patients in Thailand (2021-2022).Scientific reports · 2026Article
- Longitudinal SARS-CoV-2 Antibody Response in Healthcare Workers: Benefit of Prior Infection and Heterologous Boosting on Anti-Spike IgG Immunity.Influenza and other respiratory viruses · 2026Observational
- Protection from second booster vaccines and natural immunity against SARS-CoV-2 infections, 2022-2023.Epidemiology and infection · 2025Observational
- Immunology of RNA-based vaccines: The critical interplay between inflammation and expression.Molecular therapy : the journal of the American Society of Gene Therapy · 2025Review
- Antibody Responses to SARS-CoV-2 and Common HCoVs in Hemodialysis Patients and Transplant Recipients: Data from the Dominican Republic.Vaccines · 2025Article
- Culturally targeted messaging and racial equity in SARS-CoV-2 antibody testing by multiplex salivary measurement: Protocol overview of a SeroNet investigation.Brain, behavior, & immunity - health · 2025Article
- Impact of Extended Dosing Intervals and Ipsilateral Versus Contralateral Boosting on mRNA Vaccine Immunogenicity in Mice.Vaccines · 2025Article
- Alphaviral backbone of self-amplifying RNA enhances protein expression and immunogenicity against SARS-CoV-2 antigen.Molecular therapy : the journal of the American Society of Gene Therapy · 2025Article
- Safety, immunogenicity, and breakthrough infections during 1-year follow-up after COVISHIELD™ vaccination among healthcare workers in a teaching institute in North India: A prospective longitudinal study.Journal of family medicine and primary care · 2025Article
- Improved antibody breadth with an extended primary dose interval of COVID-19 vaccine is overcome by boosters.Frontiers in immunology · 2025Article
- Article
15 more citing papers are in PubMed but not listed here.
Corrections and comments
- Erratum issued
Authors and funding
18 authors at 4 institutions in 1 country.
Funding
Abstract
The UK prioritised delivery of the first dose of BNT162b2 (Pfizer/BioNTech) and AZD1222 (AstraZeneca) vaccines by extending the interval between doses up to 12 weeks. In 750 participants aged 50-89 years, we here compare serological responses after BNT162b2 and AZD1222 vaccination with varying dose intervals, and evaluate these against real-world national vaccine effectiveness (VE) estimates against COVID-19 in England. We show that antibody levels 14-35 days after dose two are higher in BNT162b2 recipients with an extended vaccine interval (65-84 days) compared with those vaccinated with a standard (19-29 days) interval. Following the extended schedule, antibody levels were 6-fold higher at 14-35 days post dose 2 for BNT162b2 than AZD1222. For both vaccines, VE was higher across all age-groups from 14 days after dose two compared to one dose, but the magnitude varied with dose interval. Higher dose two VE was observed with >6 week interval between BNT162b2 doses compared to the standard schedule. Our findings suggest higher effectiveness against infection using an extended vaccine schedule. Given global vaccine constraints these results are relevant to policymakers.
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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.