Evidence map›Paper›PMID 24829215›Full record

ArticleClinical infectious diseases : an official publication of the Infectious Diseases Society of America2014

School-located influenza vaccination decreases laboratory-confirmed influenza and improves school attendance.

Pia S Pannaraj, Hai-Lin Wang, Hector Rivas, Hilda Wiryawan, Michael Smit, Nicole Green, Grace M Aldrovandi, Alvin Nelson El Amin, Laurene Mascola

Open access · bronzeAbstract read
In one paragraph

Article in Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 3 pooled it
6.9field-weighted citation impact, top 3% 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

42 citing papers in PubMed, 3 syntheses or guidelines pooled it, 84 citations in OpenAlex.

  1. Pooled it
  2. Herd effect from influenza vaccination in non-healthcare settings: a systematic review of randomised controlled trials and observational studies.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2016
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 2 countries.

Pia S PannarajDivision of Infectious Diseases, Children's Hospital Los Angeles Department of Pediatrics and Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California.
Hai-Lin WangDivision of Infectious Diseases, Children's Hospital Los Angeles.
Hector RivasPublic Health Laboratory.
Hilda WiryawanDivision of Infectious Diseases, Children's Hospital Los Angeles.
Michael SmitDivision of Infectious Diseases, Children's Hospital Los Angeles.
Nicole GreenPublic Health Laboratory.
Grace M AldrovandiDivision of Infectious Diseases, Children's Hospital Los Angeles Department of Pediatrics and Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California.
Alvin Nelson El AminImmunization Program.
Laurene MascolaAcute Communicable Disease Control, Los Angeles County Department of Public Health, California.
Children's Hospital of Los Angeles · USNational Public Health Laboratory · NPLos Angeles County Department of Public Health · US

Funding

Mucosal vs Systemic Influenza Vaccine While Breastfeeding: Milk ImmunityK23HD072774 · NICHD · CHILDREN'S HOSPITAL OF LOS ANGELES · PI PANNARAJ, PIA S · 2013 to 2017
$668k
NICHD NIH HHS 5 K23 HD072774-02NICHD NIH HHS K23 HD072774
6 · The paper itself

Abstract

backgroundSchool-located influenza vaccination (SLV) programs can efficiently immunize large numbers of school-aged children. We evaluated the impact of SLV on laboratory-confirmed influenza and absenteeism.

methodsActive surveillance for influenza-like illness (ILI) was conducted on 4455 children in 4 SLV intervention and 4 control elementary schools (grades K-6) matched for sociodemographic characteristics during the 2010-2011 influenza season in Los Angeles County, California. Combined nose/throat swabs were collected from febrile children with ILI at presentation to the school nurse or during absenteeism.

resultsIn SLV schools, 26.9%-46.6% of enrolled students received at least 1 dose of either inactivated or live attenuated influenza vaccine compared with 0.8%-4.3% in control schools. Polymerase chain reaction for respiratory viruses (PCR) was performed on 1021 specimens obtained from 898 children. Specimens were positive for influenza in 217 (21.3%), including 2009 H1N1 (30.9%), H3 (9.2%), and B (59.9%). Children attending SLV schools, regardless of vaccination status, were 30.8% (95% confidence interval, 10.1%-46.8%) less likely to acquire influenza compared with children at control schools. Unvaccinated children were indirectly protected in the school with nearly 50% vaccination coverage compared with control schools (influenza rate, 27.1 vs 60.0 per 1000 children; P = .023). Unvaccinated children missed more school days than vaccinated children (4.3 vs 2.8 days per 100 school days; P < .001).

conclusionsVaccination of at least a quarter of the school population resulted in decreased influenza rates and improved school attendance. Herd immunity for unvaccinated children may occur in schools with vaccination coverage approaching 50%.

Indexed as

VaccinationAbsenteeismAdolescentCaliforniaChildChild, PreschoolFemaleHumansInfluenza A virusInfluenza A Virus, H1N1 SubtypeInfluenza, HumanInfluenza VaccinesMaleSchoolsStudentsVaccines, AttenuatedInfluenza VaccinesVaccines, Attenuatedherd immunityinfluenzainfluenza vaccineschool-located influenza vaccination

Identifiers

PMID24829215
PMCPMC4155443
OpenAlexW2115404888

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.