Key result
COVID-19 infectivity and death rates exhibit distinct circaseptan periodicity that varies significantly across countries, potentially reflecting biological factors or data reporting practices.
Observational
Yes
The study highlights circaseptan periodicity in COVID-19 infectivity and death rates, suggesting biological or reporting-related origins that vary significantly by country.
May confound weekly COVID-19 surveillance; hypothesis-generating for country-specific drivers and requires prospective validation.
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.
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Pavlı́ček et al. (2020) conducted an observational in COVID-19. Geographic location and reporting practices was evaluated on Oscillations in infectivity and death rates. COVID-19 infectivity and death rates exhibit distinct circaseptan periodicity that varies significantly across countries, potentially reflecting biological factors or data reporting practices.
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