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View article: The evolving usefulness of the Test-Negative Design in studying risk factors for COVID-19 due to changes in testing policy
The evolving usefulness of the Test-Negative Design in studying risk factors for COVID-19 due to changes in testing policy Open
This paper is a short extension of our previous paper [arXiv:2004.06033] about the use of the Test-Negative design to study risk factors for COVID-19 [See: PubMed and ArXiv reference below] Reason for the extension is that the conditions u…