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Volume 28, Number 12—December 2022
Research

Daily Rapid Antigen Exit Testing to Tailor University COVID-19 Isolation Policy

Rebecca EarnestComments to Author , Christine Chen, Chrispin Chaguza, Anne M. Hahn, Nathan D. Grubaugh1, Madeline S. Wilson1, and for the Yale COVID-19 Resulting and Isolation Team2
Author affiliations: Yale School of Public Health, New Haven, Connecticut, USA (R. Earnest, C. Chaguza, A.M. Hahn, N.D. Grubaugh); Yale Health, New Haven (C. Chen, M.S. Wilson); Yale University, New Haven (N.D. Grubaugh)

Main Article

Figure

Rapid antigen testing results by isolation day and positivity duration by days since the last negative test category in study of students isolated for positive SARS-CoV-2 results. Left axis shows percent still positive of the original study population; right axis shows the number tested positive on each isolation day. A) Last negative test ≤4 days earlier (N = 177). B) Last negative test 5–9 days earlier (N = 47). C) Last negative test ≥10 days before the earliest test (inconclusive or positive) (N = 91). One person was removed due to missing last negative test data, and 10 persons were removed due to testing inconclusive initially but counted the first positive test as day 0.

Figure. Rapid antigen testing results by isolation day and positivity duration by days since the last negative test category in study of students isolated for positive SARS-CoV-2 results. Left axis shows percent still positive of the original study population; right axis shows the number tested positive on each isolation day. A) Last negative test ≤4 days earlier (N = 177). B) Last negative test 5–9 days earlier (N = 47). C) Last negative test ≥10 days before the earliest test (inconclusive or positive) (N = 91). One person was removed due to missing last negative test data, and 10 persons were removed due to testing inconclusive initially but counted the first positive test as day 0.

Main Article

1These authors contributed equally to this article.

2Members of the team are listed at the end of this article.

Page created: November 08, 2022
Page updated: November 21, 2022
Page reviewed: November 21, 2022
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