Letter: low population mortality from COVID-19 in countries south of latitude 35° North supports vitamin D as a factor determining severity. Authors' reply.

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.

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.

1. New COVID-19 variant (B.1.1.7): Forecasting the occasion of virus and the related meteorological factors.Journal of infection and public health · 2021
   Article
2. What Could Explain the Lower COVID-19 Burden in Africa despite Considerable Circulation of the SARS-CoV-2 Virus?International journal of environmental research and public health · 2021
   Review
3. Lack of association of baseline 25-hydroxyvitamin D levels with disease severity and mortality in Indian patients hospitalized for COVID-19.Scientific reports · 2021
   Observational
4. Notable Developments for Vitamin D Amid the COVID-19 Pandemic, but Caution Warranted Overall: A Narrative Review.Nutrients · 2021
   Review
5. Optimizing the production of vitamin D in white button mushrooms (Lebensmittel-Wissenschaft + [i.e. und] Technologie. Food science + technology. Science + technologie alimentaire · 2021
   Article
6. Sunlight ultraviolet radiation dose is negatively correlated with the percent positive of SARS-CoV-2 and four other common human coronaviruses in the U.S.The Science of the total environment · 2021
   Article
7. The prophylaxis and treatment potential of supplements for COVID-19.European journal of pharmacology · 2020
   Review
8. Nutritional status of patients with COVID-19.International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2020
   Article
9. Evidence for possible association of vitamin D status with cytokine storm and unregulated inflammation in COVID-19 patients.Aging clinical and experimental research · 2020
   Article
10. A brief review of interplay between vitamin D and angiotensin-converting enzyme 2: Implications for a potential treatment for COVID-19.Reviews in medical virology · 2020
    Review
11. Lungs as target of COVID-19 infection: Protective common molecular mechanisms of vitamin D and melatonin as a new potential synergistic treatment.Life sciences · 2020
    Review
12. Consensus transcriptional regulatory networks of coronavirus-infected human cells.bioRxiv : the preprint server for biology · 2020
    Article
13. Strengthening the Immune System and Reducing Inflammation and Oxidative Stress through Diet and Nutrition: Considerations during the COVID-19 Crisis.Nutrients · 2020
    Review
14. A Basic Review of the Preliminary Evidence That COVID-19 Risk and Severity Is Increased in Vitamin D Deficiency.Frontiers in public health · 2020
    Review
15. Vitamin D high doses supplementation could represent a promising alternative to prevent or treat COVID-19 infection.Clinica e investigacion en arteriosclerosis : publicacion oficial de la Sociedad Espanola de Arteriosclerosis
    Review

Corrections and comments

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  Letter: low population mortality from COVID-19 in countries south of latitude 35 degrees North supports vitamin D as a factor determining severity.2020

Authors and funding

4 authors.

Funding

No grant is acknowledged in the PubMed record.

Abstract

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