The severe acute respiratory syndrome of coronavirus 2 spread globally very quickly, causing great concern at the international level due to the severity of the associated respiratory disease, the so-called COVID-19. Considering Rio de Janeiro city (Brazil) as an example, the first diagnosis of this disease occurred in March 2020, but the exact moment when the local spread of the virus started is uncertain as the Brazilian epidemiological surveillance system was not widely prepared to detect suspected cases of COVID-19 at that time. Improvements in this surveillance system occurred over the pandemic, but due to the complex nature of the disease transmission process, specifying the exact moment of emergence of new community contagion outbreaks is a complicated task. This work aims to propose a general methodology to determine possible start dates for the multiple community outbreaks of COVID-19, using for this purpose a parametric statistical approach that combines surveillance data, nonlinear regression, and information criteria to obtain a statistical model capable of describing the multiple waves of contagion observed. The dynamics of COVID-19 in the city of Rio de Janeiro is taken as a case study, and the results suggest that the original strain of the virus was already circulating in Rio de Janeiro city as early as late February 2020, probably being massively disseminated in the population during the carnival festivities.
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March 2022
Research Article|
March 03 2022
The starting dates of COVID-19 multiple waves
Paulo Roberto de Lima Gianfelice
;
Paulo Roberto de Lima Gianfelice
1
Institute of Science and Technology, Federal University of São Paulo
, São José dos Campos 12247-014, Brazil
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Ricardo Sovek Oyarzabal
;
Ricardo Sovek Oyarzabal
1
Institute of Science and Technology, Federal University of São Paulo
, São José dos Campos 12247-014, Brazil
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Americo Cunha, Jr.
;
Americo Cunha, Jr.
a)
2
Department of Applied Mathematics, Rio de Janeiro State University
, Rio de Janeiro 20550-900, Brazil
a)Author to whom correspondence should be addressed: elbert.macau@unifesp.br
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Jose Mario Vicensi Grzybowski
;
Jose Mario Vicensi Grzybowski
3
Environmental Science and Technology Postgraduate Program, Federal University of Fronteira Sul
, Erechim 99700-970, Brazil
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Fernando da Conceição Batista
;
Fernando da Conceição Batista
4
Polytechnic Institute of Leiria
, Leiria 2411-901, Portugal
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Elbert E. N. Macau
Elbert E. N. Macau
1
Institute of Science and Technology, Federal University of São Paulo
, São José dos Campos 12247-014, Brazil
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a)Author to whom correspondence should be addressed: elbert.macau@unifesp.br
Chaos 32, 031101 (2022)
Article history
Received:
November 25 2021
Accepted:
February 09 2022
Citation
Paulo Roberto de Lima Gianfelice, Ricardo Sovek Oyarzabal, Americo Cunha, Jose Mario Vicensi Grzybowski, Fernando da Conceição Batista, Elbert E. N. Macau; The starting dates of COVID-19 multiple waves. Chaos 1 March 2022; 32 (3): 031101. https://doi.org/10.1063/5.0079904
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