Travel Health Evidence

Evidence map

Travel vaccines: what the evidence base looks like

8 publications, 0 of them trials and 7 syntheses. This page describes the shape of that literature rather than summarising its conclusions.

Updated 4 min read 8 citations

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What the evidence on travel vaccines is made of Of 8 publications on this topic, the breakdown by study type: 7 meta-analysis, 1 review. 71meta-analysis (7)review (1)
8 publications, by study type. Volume is not strength — the same count can be a settled question or a pile of commentary, and which one it is depends almost entirely on this breakdown. Harvested from PubMed and Crossref; publication type as recorded by the source.

What this literature is made of

The synthesis is ahead of the primary literature here — reviews and meta-analyses drawing on a modest number of underlying studies. Treat confident conclusions with the caution the sample size deserves.

The distinction that matters most is between synthesis and primary research. A meta-analysis pools trials and is the closest thing to a settled answer a field produces. A narrative review is one group's reading of the same material and can be selective without being dishonest. Counting them together, which most citation counts do, obscures exactly the thing you want to know.

When the travel vaccines literature was published Publication years for the 8 papers on this topic, grouped into bands from before 2015 through to 2023 onwards. 2023 onwards4 papersBefore 20153 papers2015-20191 papers
Still active. The most recent paper here is from 2025, so this is a field where an answer written today may not hold for long. Publication years as recorded by PubMed and Crossref.

How this page is built

Everything above is computed from the citations this site harvested from PubMed and Crossref, not written by hand. When the weekly harvest finds a new paper on this topic, these counts change and the characterisation changes with them. That is the point: a hand-written claim about how strong an evidence base is starts decaying the day it is written.

Publication type is taken as the source records it. That is imperfect — journals label inconsistently, and a paper indexed as a "review" may be a systematic one — so treat the bands as approximate. They are accurate enough to distinguish a trial literature from a commentary literature, which is the distinction that matters.

Waiting area of an airport departure hall with rows of seats and daylight from above
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The strongest work on this topic

Ordered by study design first, then recency. The full set is listed in the references below.

  1. Management of Invasive Pulmonary Aspergillosis in Intensive Care Units: Guidelines From the Fungal Infection Network of Switzerland (FUNGINOS) — Lamoth F, Albrich WC, Ragozzino S et al., 2025, clinical guideline
  2. Diagnosis, management and prevention of loiasis: guideline of the German Society for Tropical Medicine, Travel Medicine, and Global Health (DTG) — Ramharter M, Schlabe S, Hübner MP et al., 2025, clinical guideline
  3. Executive Summary of the Spanish Guidelines for the Diagnosis and Management of Imported Febrile Illnesses from the Spanish Society of Tropical Medicine and International Health (SEMTSI), the Imported Pathology Group of the Spanish Society of Infectious Diseases and Clinical Microbiology (GEPI-SEIMC), the Spanish Society of Family and Community Medicine (SEMFYC), the Spanish Society of Primary Care Physicians (SEMERGEN) and the Spanish Society of Emergency Medicine (SEMES) — Camprubí-Ferrer D, Díaz Menendez M, Crespillo-Andújar C et al., 2024, systematic review
  4. 2015 ESC/ERS Guidelines for the diagnosis and treatment of pulmonary hypertension: The Joint Task Force for the Diagnosis and Treatment of Pulmonary Hypertension of the European Society of Cardiology (ESC) and the European Respiratory Society (ERS): Endorsed by: Association for European Paediatric and Congenital Cardiology (AEPC), International Society for Heart and Lung Transplantation (ISHLT) — Galiè N, Humbert M, Vachiery JL et al., 2016, clinical guideline
  5. New Italian guidelines for malaria prophylaxis in travellers to endemic areas — Calleri G, Castelli F, El Hamad I et al., 2014, clinical guideline
  6. Recommendations for the practice of travel medicine — Chiodini JH, Anderson E, Driver C et al., 2012, clinical guideline
  7. Practice guidelines for evaluation of Fever in returning travelers and migrants — D'Acremont V, Ambresin AE, Burnand B et al., 2003, clinical guideline
  8. UK guidelines for the investigation and management of eosinophilia in returning travellers and migrants — Thakker C, Warrell C, Barrett J et al., 2025, review
How much research is there on travel vaccines?
8 publications are indexed here, of which 0 are trials and 7 are syntheses.
Does more research mean a stronger conclusion?
No. Composition matters more than volume — five randomised trials support a claim far better than fifty commentaries, and citation counts do not distinguish between them.
How current is this?
The most recent paper indexed here is from 2025. The set is refreshed weekly from PubMed and Crossref.
Why does this page not tell me the answer?
Because summarising a literature into a conclusion requires reading it, and doing that automatically is how confident nonsense gets published. This page tells you how much weight a conclusion could bear; the articles on this site do the interpreting.

References

Every citation below links to the original peer-reviewed record on PubMed or via DOI. Nothing here is a substitute for medical advice.

  1. Diagnosis, management and prevention of loiasis: guideline of the German Society for Tropical Medicine, Travel Medicine, and Global Health (DTG) Ramharter M, Schlabe S, Hübner MP, et al. · Infection · 2025 · Clinical guideline DOIPubMed 40397272Full text
  2. Management of Invasive Pulmonary Aspergillosis in Intensive Care Units: Guidelines From the Fungal Infection Network of Switzerland (FUNGINOS) Lamoth F, Albrich WC, Ragozzino S, et al. · Mycoses · 2025 · Clinical guideline DOIPubMed 41311305Full text
  3. Executive Summary of the Spanish Guidelines for the Diagnosis and Management of Imported Febrile Illnesses from the Spanish Society of Tropical Medicine and International Health (SEMTSI), the Imported Pathology Group of the Spanish Society of Infectious Diseases and Clinical Microbiology (GEPI-SEIMC), the Spanish Society of Family and Community Medicine (SEMFYC), the Spanish Society of Primary Care Physicians (SEMERGEN) and the Spanish Society of Emergency Medicine (SEMES) Camprubí-Ferrer D, Díaz Menendez M, Crespillo-Andújar C, et al. · Enfermedades infecciosas y microbiologia clinica (English ed.) · 2024 · Systematic review DOIPubMed 38965027
  4. 2015 ESC/ERS Guidelines for the diagnosis and treatment of pulmonary hypertension: The Joint Task Force for the Diagnosis and Treatment of Pulmonary Hypertension of the European Society of Cardiology (ESC) and the European Respiratory Society (ERS): Endorsed by: Association for European Paediatric and Congenital Cardiology (AEPC), International Society for Heart and Lung Transplantation (ISHLT) Galiè N, Humbert M, Vachiery JL, et al. · European heart journal · 2016 · Clinical guideline DOIPubMed 26320113
  5. New Italian guidelines for malaria prophylaxis in travellers to endemic areas Calleri G, Castelli F, El Hamad I, et al. · Infection · 2014 · Clinical guideline DOIPubMed 24347205
  6. Recommendations for the practice of travel medicine Chiodini JH, Anderson E, Driver C, et al. · Travel medicine and infectious disease · 2012 · Clinical guideline DOIPubMed 22658381
  7. Practice guidelines for evaluation of Fever in returning travelers and migrants D'Acremont V, Ambresin AE, Burnand B, et al. · Journal of travel medicine · 2003 · Clinical guideline DOIPubMed 12740187
  8. UK guidelines for the investigation and management of eosinophilia in returning travellers and migrants Thakker C, Warrell C, Barrett J, et al. · The Journal of infection · 2025 · Review DOIPubMed 39537036