Evidence map›Paper›PMID 33572306›Full record

ArticlePathogens (Basel, Switzerland)2021

Seasonality of Non-SARS, Non-MERS Coronaviruses and the Impact of Meteorological Factors.

Olympia E Anastasiou, Anika Hüsing, Johannes Korth, Fotis Theodoropoulos, Christian Taube, Karl-Heinz Jöckel, Andreas Stang, Ulf Dittmer

Open access · goldAbstract read
In one paragraph

Article in Pathogens (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
1.0field-weighted citation impact, top 26% of its field
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

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

  1. Global meta-analysis of short-term associations between ambient temperature and pathogen-specific respiratory infections, 2004 to 2023.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2025
    Pooled it
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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

8 authors at 2 institutions in 1 country.

Olympia E AnastasiouInstitute for Virology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany.ORCID 0000-0003-2178-3182
Anika HüsingInstitute of Medical Informatics, Biometry and Epidemiology, University Hospital Essen, University Duisburg-Essen, 45122 Essen, Germany.
Johannes KorthDepartment of Nephrology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany.ORCID 0000-0003-4898-0389
Fotis TheodoropoulosDepartment of Pulmonary Medicine, University Hospital of Essen-Ruhrlandklinik, 45239 Essen, Germany.
Christian TaubeDepartment of Pulmonary Medicine, University Hospital of Essen-Ruhrlandklinik, 45239 Essen, Germany.
Karl-Heinz JöckelInstitute of Medical Informatics, Biometry and Epidemiology, University Hospital Essen, University Duisburg-Essen, 45122 Essen, Germany.
Andreas StangInstitute of Medical Informatics, Biometry and Epidemiology, University Hospital Essen, University Duisburg-Essen, 45122 Essen, Germany.ORCID 0000-0001-6363-9061
Ulf DittmerInstitute for Virology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany.
University of Duisburg-Essen · DERuhrlandklinik · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSeasonality is a characteristic of some respiratory viruses. The aim of our study was to evaluate the seasonality and the potential effects of different meteorological factors on the detection rate of the non-SARS coronavirus detection by PCR.

methodsWe performed a retrospective analysis of 12,763 respiratory tract sample results (288 positive and 12,475 negative) for non-SARS, non-MERS coronaviruses (NL63, 229E, OC43, HKU1). The effect of seven single weather factors on the coronavirus detection rate was fitted in a logistic regression model with and without adjusting for other weather factors.

resultsCoronavirus infections followed a seasonal pattern peaking from December to March and plunged from July to September. The seasonal effect was less pronounced in immunosuppressed patients compared to immunocompetent patients. Different automatic variable selection processes agreed on selecting the predictors temperature, relative humidity, cloud cover and precipitation as remaining predictors in the multivariable logistic regression model, including all weather factors, with low ambient temperature, low relative humidity, high cloud cover and high precipitation being linked to increased coronavirus detection rates.

conclusionsCoronavirus infections followed a seasonal pattern, which was more pronounced in immunocompetent patients compared to immunosuppressed patients. Several meteorological factors were associated with the coronavirus detection rate. However, when mutually adjusting for all weather factors, only temperature, relative humidity, precipitation and cloud cover contributed independently to predicting the coronavirus detection rate.

Indexed as

coronavirusimmunosuppressionmeteorologicalseasonalityweather

Identifiers

PMID33572306
PMCPMC7916144
OpenAlexW3128586450

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

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.