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. 2021 May 28;70(21):785–791. doi: 10.15585/mmwr.mm7021e2

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The figure is a series of two combination bar and line charts showing the number of school-based SARS-CoV-2 rapid antigen tests performed and the percentage positive among students participating in Test to Play (A) and Test to Stay (B), by week or date of testing event and high school (for Test to Stay) in Utah during November 30, 2020–March 20, 2021. — Number of school-based SARS-CoV-2 rapid antigen tests* performed and percentage positive among students participating in Test to Play (A)^† and Test to Stay (B),^§ by week or date of testing event and high school (for Test to Stay) — Utah, November 30, 2020–March 20, 2021

* Abbott BinaxNOW rapid antigen nasal swab test kits were provided at no cost to the Utah Department of Health by the U.S. Department of Health and Human Services. https://www.fda.gov/media/141570/download

^† Test to Play, which required testing every 14 days for participants in high school extracurricular activities, is described in the Utah COVID-19 School Manual (https://coronavirus-download.utah.gov/School/COVID-19_School_Manual_FINAL.pdf) and was mandated by Utah State Public Health Order 2020-25 (https://coronavirus-download.utah.gov/Health/UPHO_2020-25_Statewide_COVID-19_Restrictions.pdf), effective November 30, 2020.

^§ Beginning August 2020, schools were advised to transition to remote instruction for 14 days when the number of school-associated cases among students and staff members crossed a specified outbreak threshold. During August–December 2020, the outbreak threshold was 15 school-associated cases during the previous 14 days. Under Test to Stay (https://coronavirus-download.utah.gov/School/COVID-19_School_Manual_FINAL.pdf), which began January 4, 2021, the outbreak threshold of cases during the previous 14 days changed to 1% of the school population for schools with >1,500 students and staff members and 15 cases for schools with ≤1,500 students and staff members, and the period of advised remote instruction after crossing the outbreak threshold changed to 10 days. Each of the 13 schools that conducted Test to Stay is represented by a unique letter (A–M). With the exception of the second high school G event, Test to Stay events were conducted over 1 or 2 days and all student testing reported by these schools during the events was counted as Test to Stay. Multiday Test to Stay events are indicated on the first day of the event. High school G conducted a Test to Stay event during January 25–26 after crossing the outbreak threshold. Subsequently, high school G conducted modified, follow-up Test to Stay testing during February 8–March 9; all Test to Stay testing among students reported by this school during this period is represented as a single, additional event. High school K conducted a Test to Stay event when the school was approaching, but had not reached, the outbreak threshold.