COVID-19: Do weather conditions influence the transmission of the coronavirus (SARS-CoV-2) in Brasília and Manaus, Brazil?
Authors: Coelho Junior Francisco Antonio , Marques-Quinteiro Pedro , Faiad Cristiane 
Published: April 2021

The global outbreak of coronavirus SARS-CoV-2 (COVID-19) disease is affecting every part of human lives. Several researchers investigated to understand how temperature, humidity and air pollution had an influence on COVID-19 transmission. Transmission of COVID-19 due to temperature and humidity is a pertinent question. There is a lack of study of Covid-19 in tropical climate countries. This study aims to analyze the correlation between weather and Covid-19 pandemic in Brasília and Manaus, two states of Brazil. The research topic is important to know how the climate affects or predisposes the spread of COVID-19. This knowledge will provide elements to decision-makers regarding health and public health standards and decisions. This study employed a secondary data analysis of surveillance data of Covid-19 from the Ministry of Health of Brazil and weather from the National Institute of Meteorology of Brazil. These are Brazilian public organizations that, on a daily basis, record this information on a systematic basis of dates. They are central federal organizations, responsible for data analysis and public policy planning to combat Covid-19. The data are reliables and obtained from reliable government sources. We systematically record all information for 51 days, during a period of high disease growth in the country. The components of weather include low temperature (°C), high temperature (°C), temperature average (°C), humidity (%), and amount of rainfall (mm). Pearson-rank correlation test showed that high temperature (r=.643; p<.001), low temperature (r=.640; p<.001) and humidity (r=.248; p<.005) were significantly correlated with deaths caused by Covid-19 pandemic used for data analysis. Social isolation rate (β = -.254; p<.001) and daily record of new cases (β = .332; p<.001), with adjusted R-squared of .623, were the predictors of deaths acummuled by Covid-19. The finding serves as an input to reduce the incidence rate of Covid-19 in Brazil. Statistical results show evidence of the relationship between climate elements and COVID-19 indicators, such as the number of deaths, spread of contamination and social isolation rate. The study of dimensions of climate as a seasonal pattern and its relationship to COVID-19 benefits epidemiological surveillance. The more geographic spaces are known, more will help to understand the differences in disease behavior in different places. The results of this research showed that environmental conditions influence the contagion and speed of transmission of Covid-19. Policies that contribute to benefits to health and sustainability need to be planned. The contribution of climate and other factors, such as air pollution, for example, require additional studies. Environmental changes, such as climate change and biodiversity, must also be investigated for their impact on human health. Acting in prevention, including the promotion of socially acceptable behaviors on the part of the population, seems to be the best way to deal with Covid-19.