ArticleDermato-endocrinology2009
Influenza, solar radiation and vitamin D.
Article in Dermato-endocrinology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 of them syntheses that pooled it.
What it found
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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.
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.
Who cites it
15 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Associations between sunshine and influenza or influenza-like illness, a systematic review and meta-analysis.International journal of biometeorology · 2026Pooled it
- Micronutrients Deficiency, Supplementation and Novel Coronavirus Infections-A Systematic Review and Meta-Analysis.Nutrients · 2021Pooled it
- Article
- The Role of Vitamin D in Stroke Prevention and the Effects of Its Supplementation for Post-Stroke Rehabilitation: A Narrative Review.Nutrients · 2022Review
- Possible Roles of Permafrost Melting, Atmospheric Transport, and Solar Irradiance in the Development of Major Coronavirus and Influenza Pandemics.International journal of environmental research and public health · 2021Article
- Immune Modulatory Effects of Vitamin D on Viral Infections.Nutrients · 2020Review
- Winter Is Coming: A Southern Hemisphere Perspective of the Environmental Drivers of SARS-CoV-2 and the Potential Seasonality of COVID-19.International journal of environmental research and public health · 2020Review
- Seasonality of Respiratory Viral Infections: Will COVID-19 Follow Suit?Frontiers in public health · 2020Review
- Vitamin D and Influenza-Prevention or Therapy?International journal of molecular sciences · 2018Review
- Effects of calcitriol (1, 25-dihydroxy-vitamin D3) on the inflammatory response induced by H9N2 influenza virus infection in human lung A549 epithelial cells and in mice.Virology journal · 2017Article
- A Missed Summer Wave of the 1918-1919 Influenza Pandemic: Evidence From Household Surveys in the United States and Norway.Open forum infectious diseases · 2016Article
- Identifying meteorological drivers for the seasonal variations of influenza infections in a subtropical city – Hong Kong.International journal of environmental research and public health · 2015Article
- No effect of season of birth on risk of type 1 diabetes, cancer, schizophrenia and ischemic heart disease, while some variations may be seen for pneumonia and multiple sclerosis.Dermato-endocrinology · 2013Article
- Vitamin D and influenza.Advances in nutrition (Bethesda, Md.) · 2012Review
- Vitamin D Supplementation: A Potential Approach for Coronavirus/COVID-19 Therapeutics?Frontiers in immunologyArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The annual death numbers of influenza and pneumonia in Norway were studied for the time period 1980-2000. No direct relationships were found with the variations of the annual UVB fluences, probably due to the fact that these variations did not exceed 30%. However, there was a very pronounced seasonal variation of both influenza deaths and pneumonia deaths, the vast majority occurring during the winter. Vitamin D levels were also estimated from several publications. The data support the hypothesis that a high vitamin D level, as that found in the summer, acts in a protective manner with respect to influenza as well as pneumonia. The findings are discussed and compared with data from tropical and subtropical areas.
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Registered trials
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.