Evidence map›Paper›PMID 21352939›Full record

Trial reportVaccine2011

Antibody and Th1-type cell-mediated immune responses in elderly and young adults immunized with the standard or a high dose influenza vaccine.

Wilbur H Chen, Alan S Cross, Robert Edelman, Marcelo B Sztein, William C Blackwelder, Marcela F Pasetti

Abstract readComparative StudyMulticenter StudyRandomized Controlled Trial
In one paragraph

Trial report in Vaccine, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
4.4field-weighted citation impact, top 6% 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

40 citing papers in PubMed, 68 citations in OpenAlex.

  1. Trial
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  7. Article
  8. Inclusion of Women, Children, the Elderly, and Individuals With Underlying Medical Conditions: Prioritizing Vulnerable Populations in Clinical Research.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2025
    Article
  9. Observational
  10. Article
  11. Review
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  14. Review
  15. Article
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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

6 authors at 1 institution in 1 country.

Wilbur H ChenCenter for Vaccine Development, University of Maryland School of Medicine, Baltimore, MD 21201, USA. wchen@medicine.umaryland.edu
Alan S Cross
Robert Edelman
Marcelo B Sztein
William C Blackwelder
Marcela F Pasetti
University of Maryland, Baltimore · US

Funding

University of Maryland Claude D. Pepper Older Americans Independence Center (UM-OAIC)P30AG028747 · NIA · UNIVERSITY OF MARYLAND BALTIMORE · PI ALICE S. RYAN · 2006 to 2026
$28.9M
Clinical Research Career Development (RMI)K12RR023250 · NCRR · UNIVERSITY OF MARYLAND BALTIMORE · PI SHULDINER, ALAN R. · 2005 to 2009
$13.3M
EVALUATION OF CONTROL MEASURES AGAINST DISEASES OTHER THAN AIDS-266025461N01AI025461 · NIAID · UNIVERSITY OF MARYLAND, BALT · PI LEVINE, MYRON · 2003 to 2006
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EVALUATION OF VACCINES &THERAPEUTICS IN ADULTS/ELDERLY-266985342N01AI085342 · NIAID · UNIVERSITY OF MARYLAND BALT PR · 1998 to 2004
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NCRR NIH HHS K12 RR023250NCRR NIH HHS K12-RR023250NIAID NIH HHS N01 AI025461NIAID NIH HHS N01 AI085342NIAID NIH HHS N01-AI25461NIAID NIH HHS N01-AI-800001NIAID NIH HHS N01-AI85342NIA NIH HHS P30 AG028747NIA NIH HHS P30-AG028747
6 · The paper itself

Abstract

A comparative analysis of antibody and cell-mediated immune responses was performed in ambulatory medically stable elderly and young adults who received the standard-dose of trivalent inactivated influenza vaccine, containing 15 μg of hemagglutinin (HA) per virus strain, or a high-dose vaccine containing 60 μg HA per virus strain. Among the elderly, the high dose vaccine induced greater HAI (hemagglutination inhibition) and virus neutralization antibody titers than the standard dose vaccine. These responses, however, did not achieve the magnitude of those induced by the standard dose vaccine in young adults. Vaccine-specific circulating T cells producing IFN-γ were detected in the elderly and young adults following immunization. However, there were no significant differences in the IFN-γ responses among groups. On the other hand, the standard dose vaccine in the elderly resulted in the highest proportion of complete non-responders who failed to elicit either an HAI or an IFN-γ response. This study provides further evidence that a higher dose vaccine for the elderly may result in enhanced immune responses which are predicted to improve protection although still of lower magnitude than those induced in younger healthier individuals.

Indexed as

Dose-Response Relationship, ImmunologicImmunity, CellularAdultAgedAged, 80 and overAge FactorsAntibodies, ViralAntibody FormationDouble-Blind MethodFemaleHemagglutination Inhibition TestsHumansImmunoglobulin AImmunoglobulin GInfluenza A Virus, H1N1 SubtypeInfluenza A Virus, H3N2 SubtypeAntibodies, ViralImmunoglobulin AImmunoglobulin GInfluenza VaccinesInterferon-gammaVaccines, Inactivated

Identifiers

PMID21352939
PMCPMC3070775
OpenAlexW2062666761

What OpenQuestion holds

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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.