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A cross-sectional analysis of meteorological factors and SARS-CoV-2 transmission in 409 cities across 26 countries
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A cross-sectional analysis of meteorological factors and SARS-CoV-2 transmission in 409 cities across 26 countries
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A cross-sectional analysis of meteorological factors and SARS-CoV-2 transmission in 409 cities across 26 countries
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Journal Article
A cross-sectional analysis of meteorological factors and SARS-CoV-2 transmission in 409 cities across 26 countries
2021
Overview
There is conflicting evidence on the influence of weather on COVID-19 transmission. Our aim is to estimate weather-dependent signatures in the early phase of the pandemic, while controlling for socio-economic factors and non-pharmaceutical interventions. We identify a modest non-linear association between mean temperature and the effective reproduction number (R
e
) in 409 cities in 26 countries, with a decrease of 0.087 (95% CI: 0.025; 0.148) for a 10 °C increase. Early interventions have a greater effect on R
e
with a decrease of 0.285 (95% CI 0.223; 0.347) for a 5th - 95th percentile increase in the government response index. The variation in the effective reproduction number explained by government interventions is 6 times greater than for mean temperature. We find little evidence of meteorological conditions having influenced the early stages of local epidemics and conclude that population behaviour and government interventions are more important drivers of transmission.
Possible effects of weather conditions on COVID-19 transmission are debated. Here, the authors analyse data from early in the pandemic and show that although temperature and humidity had small effects on transmission, they were far out-weighed by the effects of non-pharmaceutical interventions.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
