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Research Article Open Access
Volume 5 | Issue 1 | DOI: https://doi.org/10.46439/allergy.5.045

Impact of vaccination and testing levels on the COVID-19 waves

  • 1Institute of Hydromechanics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
+ Affiliations - Affiliations

Corresponding Author

Igor Nesteruk, inesteruk@yahoo.com

Received Date: June 20, 2024

Accepted Date: July 18, 2024

Abstract

Introduction: Record numbers of new COVID-19 cases and deaths registered in Japan, Europe, and other countries in 2022 aroused questions about efficacy of vaccination and testing. The pandemic waves in Japan, Ukraine, USA, Hong Kong, mainland China, South Korea, the UK, New Zealand, Africa, and Europe in 2020, 2021, and 2022 will be compared. Influence of vaccination and testing levels will be investigated.

Methods: The smoothed daily numbers of new cases and deaths per capita, case fatality risks as the ratio of these characteristics and accumulated numbers of deaths and cases, the tests per case ratio, and the non-linear correlation were used.

Results: As in other countries, new severe waves of the COVID-19 pandemic occurred in Japan in 2022 despite of very high vaccination level. Non-linear correlation revealed, that the daily number of new cases drastically decreases with the increase of the tests per case ratio.

Discussion: Increasing the test per case ratio and application of quarantine restrictions for the entire population, including vaccinated people, can be recommended to reduce the negative consequences of epidemics.

Keywords

COVID-19 pandemic, Efficiency of vaccinations, Testing efficacy, Mathematical modeling of infection diseases, Statistical methods

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