Evidence map›Paper›PMID 29665797›Full record

ArticleBMC infectious diseases2018

Estimating the number of unvaccinated Chinese workers against yellow fever in Angola.

A Wilder-Smith, E Massad

Abstract read
In one paragraph

Article in BMC infectious diseases, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
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

9 citing papers in PubMed.

  1. Review
  2. Yellow fever in Asia-a risk analysis.Journal of travel medicine · 2021
    Article
  3. Article
  4. Yellow fever control: current epidemiology and vaccination strategies.Tropical diseases, travel medicine and vaccines · 2020
    Review
  5. Yellow Fever in Travelers.Current infectious disease reports · 2019
    Review
  6. Article
  7. Review
  8. Article
  9. Review
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

2 authors.

A Wilder-SmithLee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore. anneliesws@gmail.com.
E MassadSchool of Medicine, University of Sao Paulo and LIM 01 HCFMUSP, Sao Paulo, Brazil.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA yellow fever epidemic occurred in Angola in 2016 with 884 laboratory confirmed cases and 373 deaths. Eleven unvaccinated Chinese nationals working in Angola were also infected and imported the disease to China, thereby presenting the first importation of yellow fever into Asia. In Angola, there are about 259,000 Chinese foreign workers. The fact that 11 unvaccinated Chinese workers acquired yellow fever suggests that many more Chinese workers in Angola were not vaccinated.

methodsWe applied a previously developed model to back-calculate the number of unvaccinated Chinese workers in Angola in order to determine the extent of lack of vaccine coverage.

resultsOur models suggest that none of the 259,000 Chinese had been vaccinated, although yellow fever vaccination is mandated by the International Health Regulations.

conclusionGovernments around the world including China need to ensure that their citizens obtain YF vaccination when traveling to countries where such vaccines are required in order to prevent the international spread of yellow fever.

Indexed as

AngolaAsian PeopleChinaDisease OutbreaksEpidemicsHumansTransients and MigrantsTravelVaccinationYellow FeverYellow Fever VaccineYellow Fever VaccineAir travelAngolaChineseImportationInternational health regulationsProof of yellow fever vaccinationYellow fever

Identifiers

PMID29665797
PMCPMC5905133

What OpenQuestion holds

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Registered trials

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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.