Evidence map›Paper›PMID 34076491›Full record

ReviewClinical microbiology reviews2021

Invasive Haemophilus influenzae Infections after 3 Decades of Hib Protein Conjugate Vaccine Use.

M P E Slack, A W Cripps, K Grimwood, G A Mackenzie, M Ulanova

Open access · greenAbstract readReview
In one paragraph

Review in Clinical microbiology reviews, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed
7.2field-weighted citation impact, top 2% 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

49 citing papers in PubMed, 85 citations in OpenAlex.

  1. Disparate kinetics in immune response of two differentHuman vaccines & immunotherapeutics · 2024
    Trial
  2. Article
  3. Article
  4. Article
  5. Product- and schedule-specific vaccine effectiveness against invasiveEuro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2026
    Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Review
  11. Article
  12. Article
  13. Review
  14. Molecular detection ofNew microbes and new infections · 2025
    Article
  15. Article
  16. Infant protection from invasiveHuman vaccines & immunotherapeutics · 2025
    Review
  17. Review
  18. Review
  19. Article
  20. Article
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

5 authors at 3 institutions in 4 countries.

M P E SlackSchool of Medicine and Dentistry, Griffith University, Gold Coast Campus, Southport, Queensland, Australia.
A W CrippsSchool of Medicine and Dentistry, Griffith University, Gold Coast Campus, Southport, Queensland, Australia.
K GrimwoodSchool of Medicine and Dentistry, Griffith University, Gold Coast Campus, Southport, Queensland, Australia.
G A MackenzieLondon School of Hygiene and Tropical Medicine, London, United Kingdom.
M UlanovaMedical Sciences Division, Northern Ontario School of Medicine, Lakehead University, Thunder Bay, Ontario, Canada.
Griffith University · AULakehead University · CALondon School of Hygiene & Tropical Medicine · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Haemophilus influenzae serotype b (Hib) was previously the most common cause of bacterial meningitis and an important etiologic agent of pneumonia in children aged <5 years. Its major virulence factor is the polyribosyl ribitol phosphate (PRP) polysaccharide capsule. In the 1980s, PRP-protein conjugate Hib vaccines were developed and are now included in almost all national immunization programs, achieving a sustained decline in invasive Hib infections. However, invasive Hib disease has not yet been eliminated in countries with low vaccine coverage, and sporadic outbreaks of Hib infection still occur occasionally in countries with high vaccine coverage. Over the past 2 decades, other capsulated serotypes have been recognized increasingly as causing invasive infections. H. influenzae serotype a (Hia) is now a major cause of invasive infection in Indigenous communities of North America, prompting a possible requirement for an Hia conjugate vaccine. H. influenzae serotypes e and f are now more common than serotype b in Europe. Significant year-to-year increases in nontypeable H. influenzae invasive infections have occurred in many regions of the world. Invasive H. influenzae infections are now seen predominantly in patients at the extremes of life and those with underlying comorbidities. This review provides a comprehensive and critical overview of the current global epidemiology of invasive H. influenzae infections in different geographic regions of the world. It discusses those now at risk of invasive Hib disease, describes the emergence of other severe invasive H. influenzae infections, and emphasizes the importance of long-term, comprehensive, clinical and microbiologic surveillance to monitor a vaccine's impact.

Indexed as

Haemophilus InfectionsHaemophilus influenzae type bHaemophilus VaccinesChildHumansInfantSerogroupVaccines, ConjugateHaemophilus VaccinesVaccines, Conjugateconjugate vaccineepidemiologyHaemophilus influenzaeHibimmunizationnontypeable H. influenzae

Identifiers

PMID34076491
PMCPMC8262803
OpenAlexW3164163709

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.