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KMID : 0365220230600010001
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Korean Journal of Public Health
2023 Volume.60 No. 1 p.1 ~ p.8
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A seroepidemiological comparative study of reported cases and deaths with actual reporting rates during the COVID-19 pandemic across multiple countries
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Lee Sang-Won
Ryu Bo-Yeong
Park Shin-Young
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Abstract
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Objectives: The COVID-19 pandemic that began in 2020 is the largest pandemic since the 1918 influenza pandemic, causing significant loss of life worldwide. To accurately understand and prepare for future pandemics, it is important to have a detailed understanding of the number of COVID-19 cases worldwide, as well as an assessment of the reliability of the reported incidence and mortality data from each country.
Methods: This study compared COVID-19 incidence, mortality, case fatality rates reported by 11 countries with the COVID-19 infection induced antibody seropositivity rates obtained from 15 surveys conducted in those countries.
Results: Based on patient incidence statistics reported by various countries from the start of the pandemic in 2020 up to March 7, 2023, patient incidence and mortality rates are higher in high-income countries and lower in low- and middle-income countries. Conversely, the case fatality rate is lower in high-income countries and higher in low- and middle-income countries. However, it is important to note that these results may be due to different reporting rates in each country. The analysis found that the estimated reporting rates of COVID-19 in low- and middle-income countries were estimated to be between 0.4% and 1.3%, while the estimated reporting rates in high-income countries were estimated to be between 15.1% and 78.5%.
Conclusion: Among the high-income countries, those with a high proportion of patients from 2020 to the end of 2021 who required hospitalization had higher case fatality rates.
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KEYWORD
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COVID-19, seroepidemiology, confirmed case, deaths, reporting rates
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