Trial reportClinical infectious diseases : an official publication of the Infectious Diseases Society of America2012
H1N1 antibody persistence 1 year after immunization with an adjuvanted or whole-virion pandemic vaccine and immunogenicity and reactogenicity of subsequent seasonal influenza vaccine: a multicenter follow-on study.
Trial report in Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT01239537 (A Multi-centre, Open-label, Clinical, Phase 4 Trial, Following on From a Head-to-head Comparison Study of Two H1N1 Influenza Vaccines in Children, to Compare Firstly, the Persistence of Antibody Against the A/California/7/2009), which is not on this map. Cited by 5 papers.
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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.
A Multi-centre, Open-label, Clinical, Phase 4 Trial, Following on From a Head-to-head Comparison Study of Two H1N1 Influenza Vaccines in Children, to Compare Firstly, the Persistence of Antibody Against the A/California/7/2009 (H1N1) Virus and Secondly the Immunogenicity and Reactogenicity of One Dose of a Non-adjuvanted Trivalent Seasonal Influenza Vaccine, in Children Who Had Received a Two-dose Immunisation Regimen of Celvapan or Pandemrix.
Who cites it
5 citing papers in PubMed, 26 citations in OpenAlex.
- Safety and immunogenicity of 2010–2011 A/H1N1pdm09-containing trivalent inactivated influenza vaccine in adults previously given AS03-adjuvanted H1N1 2009 pandemic vaccine: results of a randomized trial.Human vaccines & immunotherapeutics · 2013Trial
- Effectiveness of trivalent and monovalent influenza vaccines against laboratory-confirmed influenza infection in persons with medically attended influenza-like illness in Bavaria, Germany, 2010/2011 season.Epidemiology and infection · 2013Article
- Long-term immunogenicity of the pandemic influenza A/H1N1 2009 vaccine among health care workers: influence of prior seasonal influenza vaccination.Clinical and vaccine immunology : CVI · 2013Article
- Age-specific vaccine effectiveness of seasonal 2010/2011 and pandemic influenza A(H1N1) 2009 vaccines in preventing influenza in the United Kingdom.Epidemiology and infection · 2013Article
- Seroprevalence of influenza A(H1N1)pdm09 virus antibody, England, 2010 and 2011.Emerging infectious diseases · 2012Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
23 authors at 7 institutions in 2 countries.
Funding
Abstract
backgroundWe investigated antibody persistence in children 1 year after 2 doses of either an AS03(B)-adjuvanted split-virion or nonadjuvanted whole-virion monovalent pandemic influenza vaccine and assessed the immunogenicity and reactogenicity of a subsequent dose of trivalent influenza vaccine (TIV).
methodsChildren previously immunized at age 6 months to 12 years in the original study were invited to participate. After a blood sample was obtained to assess persistence of antibody against swine influenza A/H1N1(2009) pandemic influenza, children received 1 dose of 2010/2011 TIV, reactogenicity data were collected for 7 days, and another blood sample was obtained 21 days after vaccination.
resultsOf 323 children recruited, 302 received TIV. Antibody persistence (defined as microneutralization [MN] titer ≥1:40) 1 year after initial vaccination was significantly higher in the AS03(B)-adjuvanted compared with the whole-virion vaccine group, 100% (95% confidence interval [CI], 94.1%-100%) vs 32.4% (95% CI, 21.5%-44.8%) in children immunized <3 years old and 96.9% (95% CI, 91.3%-99.4%) vs 65.9% (95% CI, 55.3%-75.5%) in those 3-12 years old at immunization, respectively (P < .001 for both groups). All children receiving TIV had post-vaccination MN titers ≥1:40. Although TIV was well tolerated in all groups, reactogenicity in children <5 years old was slightly greater in those who originally received AS03(B)-adjuvanted vaccine.
conclusionsThis study provides serological evidence that 2 doses of AS03(B)-adjuvanted pandemic influenza vaccine may be sufficient to maintain protection across 2 influenza seasons. Administration of TIV to children who previously received 2 doses of either pandemic influenza vaccine is safe and is immunogenic for the H1N1 strain.
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