Journal
SCIENTIFIC REPORTS
Volume 11, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41598-021-82691-6
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Funding
- DoD [N629091912097]
- U.S. Department of Defense (DOD) [N629091912097] Funding Source: U.S. Department of Defense (DOD)
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During outbreaks, evaluating the number of undiagnosed infected individuals is crucial for assessing the situation and establishing protective measures. A study has found a relationship between diagnosed and undiagnosed infected individuals and calculated the effective number of SARS-CoV-2 infected individuals in various countries.
In times of outbreaks, an essential requirement for better monitoring is the evaluation of the number of undiagnosed infected individuals. An accurate estimate of this fraction is crucial for the assessment of the situation and the establishment of protective measures. In most current studies using epidemics models, the total number of infected is either approximated by the number of diagnosed individuals or is dependent on the model parameters and assumptions, which are often debated. We here study the relationship between the fraction of diagnosed infected out of all infected, and the fraction of infected with known contaminator out of all diagnosed infected. We show that those two are approximately the same in exponential models and across most models currently used in the study of epidemics, independently of the model parameters. As an application, we compute an estimate of the effective number of infected by the SARS-CoV-2 virus in various countries.
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