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. 2020 Aug 10:729:138997.
doi: 10.1016/j.scitotenv.2020.138997. Epub 2020 Apr 26.

Association between climate variables and global transmission oF SARS-CoV-2

Marcos Felipe Falcão Sobral  1 , Gisleia Benini Duarte  2 , Ana Iza Gomes da Penha Sobral  3 , Marcelo Luiz Monteiro Marinho  4 , André de Souza Melo  2
Affiliations

Association between climate variables and global transmission oF SARS-CoV-2

Marcos Felipe Falcão Sobral et al. Sci Total Environ. .

Abstract

In this study, we aimed at analyzing the associations between transmission of and deaths caused by SARS-CoV-2 and meteorological variables, such as average temperature, minimum temperature, maximum temperature, and precipitation. Two outcome measures were considered, with the first aiming to study SARS-CoV-2 infections and the second aiming to study COVID-19 mortality. Daily data as well as data on SARS-CoV-2 infections and COVID-19 mortality obtained between December 1, 2019 and March 28, 2020 were collected from weather stations around the world. The country's population density and time of exposure to the disease were used as control variables. Finally, a month dummy variable was added. Daily data by country were analyzed using the panel data model. An increase in the average daily temperature by one degree Fahrenheit reduced the number of cases by approximately 6.4 cases/day. There was a negative correlation between the average temperature per country and the number of cases of SARS-CoV-2 infections. This association remained strong even with the incorporation of additional variables and controls (maximum temperature, average temperature, minimum temperature, and precipitation) and fixed country effects. There was a positive correlation between precipitation and SARS-CoV-2 transmission. Countries with higher rainfall measurements showed an increase in disease transmission. For each average inch/day, there was an increase of 56.01 cases/day. COVID-19 mortality showed no significant association with temperature.

Keywords: COVID-19; Climate variables; Precipitation; Temperature.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no conflict of interest.

Figures

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Graphical abstract
Fig. 1
Fig. 1
Data processing strategy.
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References

    1. Bao J., Wang Z., Yu C., Li X. The influence of temperature on mortality and its Lag effect: a study in four Chinese cities with different latitudes. BMC Public Health. 2016;16(1):375–383. doi: 10.1186/s12889-016-3031-z. - DOI - PMC - PubMed
    1. Cai Q.C., Lu J., Xu Q.F., Guo Q., Xu D.Z., Sun Q.W., Jiang Q.W. Influence of meteorological factors and air pollution on the outbreak of severe acute respiratory syndrome. Public Health. 2007;121(4):258–265. doi: 10.1016/j.puhe.2006.09.023. - DOI - PMC - PubMed
    1. Chan K.H., Peiris J.S., Lam S.Y., Poon L.L.M., Yuen K.Y., Seto W.H. The effects of temperature and relative humidity on the viability of the SARS coronavirus. Advances in Virology. 2011;2011 doi: 10.1155/2011/734690. - DOI - PMC - PubMed
    1. Correia M., Ramos R.F., Bahten L.C.V. Os cirurgiões e a pandemia do COVID-19. Revista do Colégio Brasileiro de Cirurgiões. 2020;47:1–6. doi: 10.1590/0100-6991e-20202536. - DOI - PubMed
    1. Cui Y., Zhang Z.F., Froines J., Zhao J., Wang H., Yu S.Z., Detels R. Air pollution and case fatality of SARS in the People’s Republic of China: an ecologic study. Environ. Health. 2003;2(1):15. doi: 10.1186/1476-069X-2-15. - DOI - PMC - PubMed