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BMC Infectious Diseases

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Open Access 01-12-2022 | SARS-CoV-2 | Research article

Age-specific rate of severe and critical SARS-CoV-2 infections estimated with multi-country seroprevalence studies

Authors: Daniel Herrera-Esposito, Gustavo de los Campos

Published in: BMC Infectious Diseases | Issue 1/2022

Abstract

Background

Knowing the age-specific rates at which individuals infected with SARS-CoV-2 develop severe and critical disease is essential for designing public policy, for infectious disease modeling, and for individual risk evaluation.

Methods

In this study, we present the first estimates of these rates using multi-country serology studies, and public data on hospital admissions and mortality from early to mid-2020. We combine these under a Bayesian framework that accounts for the high heterogeneity between data sources and their respective uncertainties. We also validate our results using an indirect method based on infection fatality rates and hospital mortality data.

Results

Our results show that the risk of severe and critical disease increases exponentially with age, but much less steeply than the risk of fatal illness. We also show that our results are consistent across several robustness checks.

Conclusion

A complete evaluation of the risks of SARS-CoV-2 for health must take non-fatal disease outcomes into account, particularly in young populations where they can be 2 orders of magnitude more frequent than deaths.

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Title: Age-specific rate of severe and critical SARS-CoV-2 infections estimated with multi-country seroprevalence studies
Authors: Daniel Herrera-Esposito
Gustavo de los Campos
Publication date: 01-12-2022
Publisher: BioMed Central
Keywords: SARS-CoV-2
COVID-19
Published in: BMC Infectious Diseases / Issue 1/2022
Electronic ISSN: 1471-2334
DOI: https://doi.org/10.1186/s12879-022-07262-0

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