Pathogenicity of sublineage BA.5, omicron variant strain comparison with other variant strains of SARS-Cov-2 and seasonal influenza in Japan: Updated until August 2022.
DOI:
https://doi.org/10.51094/jxiv.59Keywords:
excess mortality, COVID-19, all cause death, stochastic frontier estimation, NIID model, Tokyo, JapanAbstract
Background: Sublineage BA.5 of omicron variant strain recorded the highest peak of morbidity and mortality confirmed with test per day in August for the former and September for the latter, 2022.
Object: We sought to quantify excess mortality using the National Institute of Infectious Diseases (NIID) model for all cause of death to evaluate pathogenicity of sublineage BA.5 of omicron variant strain.
Method: We applied the NIID model to deaths of all causes from 1987 up through the August, 2022 for the whole of Japan and up through June, 2022 for Tokyo.
Results: Results in Japan show that 18845 excess mortality was observed in August 2022,which means 16.8% of the baseline and almost 40% of total excess mortality during the COVID-19 pandemic.
Discussion and Conclusion: Results may indicate that its pathogenicity was stronger than other variant strain and seasonal influenza.
Downloads *Displays the aggregated results up to the previous day.
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Submitted: 2022-04-27 04:32:31 UTC
Published: 2022-05-02 09:17:47 UTC — Updated on 2022-11-14 06:52:08 UTC
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Reason(s) for revision
The study period has been extended.License
Copyright (c) 2022
Junko Kurita
Tamie Sugawara
Yasushi Ohkusa
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
