Oscillatory Dynamics in Infectivity and Death Rates of COVID-19

ABSTRACT The analysis of systematically collected data for coronavirus disease 2019 (COVID-19) infectivity and death rates has revealed, in many countries around the world, a typical oscillatory pattern with a 7-day (circaseptan) period. Additionally, in some countries, 3.5-day (hemicircaseptan) and...

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Autores principales:	Tomáš Pavlíček, Pavel Rehak, Petr Král
Formato:	article
Lenguaje:	EN
Publicado:	American Society for Microbiology 2020
Materias:	SARS-HCoV-2 computer modeling infectivity Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/cd64e1efa3574be1a5eb74ae5d4b6e39
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spelling	oai:doaj.org-article:cd64e1efa3574be1a5eb74ae5d4b6e392021-12-02T18:44:37ZOscillatory Dynamics in Infectivity and Death Rates of COVID-1910.1128/mSystems.00700-202379-5077https://doaj.org/article/cd64e1efa3574be1a5eb74ae5d4b6e392020-08-01T00:00:00Zhttps://journals.asm.org/doi/10.1128/mSystems.00700-20https://doaj.org/toc/2379-5077ABSTRACT The analysis of systematically collected data for coronavirus disease 2019 (COVID-19) infectivity and death rates has revealed, in many countries around the world, a typical oscillatory pattern with a 7-day (circaseptan) period. Additionally, in some countries, 3.5-day (hemicircaseptan) and 14-day periodicities have also been observed. Interestingly, the 7-day infectivity and death rate oscillations are almost in phase, showing local maxima on Thursdays/Fridays and local minima on Sundays/Mondays. These observations are in stark contrast to a known pattern correlating the death rate with the reduced medical staff in hospitals on the weekends. While we cannot exclude the possibility that a significant portion of the observed oscillations is associated with the reporting of the individual cases, other reasons might contribute at least partly to these data. One possible hypothesis addressing these observations is that they reflect gradually increasing stress with the progressing week, which can trigger the higher death rates on Thursdays/Fridays. Moreover, assuming the weekends provide the likely time for new infections, the maximum number of new cases might fall, again, on Thursdays/Fridays. These observations deserve further study to provide a better understanding of COVID-19 dynamics. IMPORTANCE The infectivity and death rates for COVID-19 have been observed in many countries around the world as well as in the collective data of the whole world. These oscillations show distinct circaseptan periodicity, which could be associated with numerous biological reasons as well as with improper reporting of the data collected. Since very different results are observed in different countries and even continents, such as Sweden (very significant oscillations) or India (almost no oscillations), these data provide a very important message about different conditions under which the disease is spread or is reported, which, in turn, could serve as guidance tools in future epidemics. It is necessary that follow-up studies track the observed differences and fully reliably address their origins.Tomáš PavlíčekPavel RehakPetr KrálAmerican Society for MicrobiologyarticleSARS-HCoV-2computer modelinginfectivityMicrobiologyQR1-502ENmSystems, Vol 5, Iss 4 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	SARS-HCoV-2 computer modeling infectivity Microbiology QR1-502
spellingShingle	SARS-HCoV-2 computer modeling infectivity Microbiology QR1-502 Tomáš Pavlíček Pavel Rehak Petr Král Oscillatory Dynamics in Infectivity and Death Rates of COVID-19
description	ABSTRACT The analysis of systematically collected data for coronavirus disease 2019 (COVID-19) infectivity and death rates has revealed, in many countries around the world, a typical oscillatory pattern with a 7-day (circaseptan) period. Additionally, in some countries, 3.5-day (hemicircaseptan) and 14-day periodicities have also been observed. Interestingly, the 7-day infectivity and death rate oscillations are almost in phase, showing local maxima on Thursdays/Fridays and local minima on Sundays/Mondays. These observations are in stark contrast to a known pattern correlating the death rate with the reduced medical staff in hospitals on the weekends. While we cannot exclude the possibility that a significant portion of the observed oscillations is associated with the reporting of the individual cases, other reasons might contribute at least partly to these data. One possible hypothesis addressing these observations is that they reflect gradually increasing stress with the progressing week, which can trigger the higher death rates on Thursdays/Fridays. Moreover, assuming the weekends provide the likely time for new infections, the maximum number of new cases might fall, again, on Thursdays/Fridays. These observations deserve further study to provide a better understanding of COVID-19 dynamics. IMPORTANCE The infectivity and death rates for COVID-19 have been observed in many countries around the world as well as in the collective data of the whole world. These oscillations show distinct circaseptan periodicity, which could be associated with numerous biological reasons as well as with improper reporting of the data collected. Since very different results are observed in different countries and even continents, such as Sweden (very significant oscillations) or India (almost no oscillations), these data provide a very important message about different conditions under which the disease is spread or is reported, which, in turn, could serve as guidance tools in future epidemics. It is necessary that follow-up studies track the observed differences and fully reliably address their origins.
format	article
author	Tomáš Pavlíček Pavel Rehak Petr Král
author_facet	Tomáš Pavlíček Pavel Rehak Petr Král
author_sort	Tomáš Pavlíček
title	Oscillatory Dynamics in Infectivity and Death Rates of COVID-19
title_short	Oscillatory Dynamics in Infectivity and Death Rates of COVID-19
title_full	Oscillatory Dynamics in Infectivity and Death Rates of COVID-19
title_fullStr	Oscillatory Dynamics in Infectivity and Death Rates of COVID-19
title_full_unstemmed	Oscillatory Dynamics in Infectivity and Death Rates of COVID-19
title_sort	oscillatory dynamics in infectivity and death rates of covid-19
publisher	American Society for Microbiology
publishDate	2020
url	https://doaj.org/article/cd64e1efa3574be1a5eb74ae5d4b6e39
work_keys_str_mv	AT tomaspavlicek oscillatorydynamicsininfectivityanddeathratesofcovid19 AT pavelrehak oscillatorydynamicsininfectivityanddeathratesofcovid19 AT petrkral oscillatorydynamicsininfectivityanddeathratesofcovid19
_version_	1718377706485186560

Oscillatory Dynamics in Infectivity and Death Rates of COVID-19

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