Evidence map›Paper›PMID 27006964›Full record

ArticleOpen forum infectious diseases2016

A Missed Summer Wave of the 1918-1919 Influenza Pandemic: Evidence From Household Surveys in the United States and Norway.

Svenn-Erik Mamelund, Bjørn Haneberg, Siri Mjaaland

Abstract read
In one paragraph

Article in Open forum infectious diseases, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing 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

10 citing papers in PubMed.

  1. Body Size and Risk of Death During the 1918 Influenza Pandemic in Alaska.American journal of human biology : the official journal of the Human Biology Council · 2025
    Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Race and 1918 Influenza Pandemic in the United States: A Review of the Literature.International journal of environmental research and public health · 2019
    Review
  8. Tuberculosis as a Risk Factor for 1918 Influenza Pandemic Outcomes.Tropical medicine and infectious disease · 2019
    Article
  9. Article
  10. Back to the Future: Lessons Learned From the 1918 Influenza Pandemic.Frontiers in cellular and infection microbiology · 2018
    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

3 authors.

Svenn-Erik MamelundWork Research Institute; Oslo and Akershus University College of Applied Sciences.
Bjørn HanebergDepartment of Bacteriology and Immunology, Division of Environmental Medicine and Infectious Disease Control , Norwegian Institute of Public Health.
Siri MjaalandDepartment of Bacteriology and Immunology, Division of Environmental Medicine and Infectious Disease Control, Norwegian Institute of Public Health; KG Jebsen Centre for Influenza Vaccine Research, University of Oslo, Norway.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background.  Reanalysis of influenza survey data from 1918 to 1919 was done to obtain new insights into the geographic and host factors responsible for the various waves. Methods.  We analyzed the age- and sex-specific influenza morbidity, fatality, and mortality for the city of Baltimore and smaller towns and rural areas of Maryland and the city of Bergen (Norway), using survey data. The Maryland surveys captured the 1918 fall wave, whereas the Bergen survey captured 3 waves during 1918-1919. Results.  Morbidity in rural areas of Maryland was higher than in the city of Baltimore during the fall of 1918, that was almost equal to that in Bergen during the summer of 1918. In Bergen, the morbidity in the fall was only half of that in the summer, with more females than males just above the age of 20 falling ill, as seen in both regions of Maryland. In contrast, more males than females fell ill during the summer wave in Bergen. Individuals <40 years had the highest morbidity, whereas school-aged children had the lowest fatality and mortality. Conclusion.  A previously unrecognized pandemic summer wave may have hit the 2 regions of Maryland in 1918.

Indexed as

fatalitygendermorbiditySpanish influenzavitamin D

Identifiers

PMID27006964
PMCPMC4800462

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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.