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Low SARS-CoV-2 Transmission in Elementary Schools - Salt Lake County, Utah, December 3, 2020-January 31, 2021.
MMWR Morb Mortal Wkly Rep. 2021 03 26; 70(12):442-448.MM

Abstract

School closures affected more than 55 million students across the United States when implemented as a strategy to prevent the transmission of SARS-CoV-2, the virus that causes COVID-19 (1). Reopening schools requires balancing the risks for SARS-CoV-2 infection to students and staff members against the benefits of in-person learning (2). During December 3, 2020-January 31, 2021, CDC investigated SARS-CoV-2 transmission in 20 elementary schools (kindergarten through grade 6) that had reopened in Salt Lake County, Utah. The 7-day cumulative number of new COVID-19 cases in Salt Lake County during this time ranged from 290 to 670 cases per 100,000 persons.† Susceptible§ school contacts¶ (students and staff members exposed to SARS-CoV-2 in school) of 51 index patients** (40 students and 11 staff members) were offered SARS-CoV-2 reverse transcription-polymerase chain reaction (RT-PCR) testing. Among 1,041 susceptible school contacts, 735 (70.6%) were tested, and five of 12 cases identified were classified as school-associated; the secondary attack rate among tested susceptible school contacts was 0.7%. Mask use among students was high (86%), and the median distance between students' seats in classrooms was 3 ft. Despite high community incidence and an inability to maintain ≥6 ft of distance between students at all times, SARS-CoV-2 transmission was low in these elementary schools. The results from this investigation add to the increasing evidence that in-person learning can be achieved with minimal SARS-CoV-2 transmission risk when multiple measures to prevent transmission are implemented (3,4).

Authors

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Pub Type(s)

Journal Article

Language

eng

PubMed ID

33764967

Citation

Hershow, Rebecca B., et al. "Low SARS-CoV-2 Transmission in Elementary Schools - Salt Lake County, Utah, December 3, 2020-January 31, 2021." MMWR. Morbidity and Mortality Weekly Report, vol. 70, no. 12, 2021, pp. 442-448.
Hershow RB, Wu K, Lewis NM, et al. Low SARS-CoV-2 Transmission in Elementary Schools - Salt Lake County, Utah, December 3, 2020-January 31, 2021. MMWR Morb Mortal Wkly Rep. 2021;70(12):442-448.
Hershow, R. B., Wu, K., Lewis, N. M., Milne, A. T., Currie, D., Smith, A. R., Lloyd, S., Orleans, B., Young, E. L., Freeman, B., Schwartz, N., Bryant, B., Espinosa, C., Nakazawa, Y., Garza, E., Almendares, O., Abara, W. E., Ehlman, D. C., Waters, K., ... Chu, V. T. (2021). Low SARS-CoV-2 Transmission in Elementary Schools - Salt Lake County, Utah, December 3, 2020-January 31, 2021. MMWR. Morbidity and Mortality Weekly Report, 70(12), 442-448. https://doi.org/10.15585/mmwr.mm7012e3
Hershow RB, et al. Low SARS-CoV-2 Transmission in Elementary Schools - Salt Lake County, Utah, December 3, 2020-January 31, 2021. MMWR Morb Mortal Wkly Rep. 2021 03 26;70(12):442-448. PubMed PMID: 33764967.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Low SARS-CoV-2 Transmission in Elementary Schools - Salt Lake County, Utah, December 3, 2020-January 31, 2021. AU - Hershow,Rebecca B, AU - Wu,Karen, AU - Lewis,Nathaniel M, AU - Milne,Alison T, AU - Currie,Dustin, AU - Smith,Amanda R, AU - Lloyd,Spencer, AU - Orleans,Brian, AU - Young,Erin L, AU - Freeman,Brandi, AU - Schwartz,Noah, AU - Bryant,Bobbi, AU - Espinosa,Catherine, AU - Nakazawa,Yoshinori, AU - Garza,Elizabeth, AU - Almendares,Olivia, AU - Abara,Winston E, AU - Ehlman,Daniel C, AU - Waters,Keith, AU - Hill,Mary, AU - Risk,Ilene, AU - Oakeson,Kelly, AU - Tate,Jacqueline E, AU - Kirking,Hannah L, AU - Dunn,Angela, AU - Vallabhaneni,Snigdha, AU - Hersh,Adam L, AU - Chu,Victoria T, Y1 - 2021/03/26/ PY - 2021/3/25/entrez PY - 2021/3/26/pubmed PY - 2021/3/27/medline SP - 442 EP - 448 JF - MMWR. Morbidity and mortality weekly report JO - MMWR Morb Mortal Wkly Rep VL - 70 IS - 12 N2 - School closures affected more than 55 million students across the United States when implemented as a strategy to prevent the transmission of SARS-CoV-2, the virus that causes COVID-19 (1). Reopening schools requires balancing the risks for SARS-CoV-2 infection to students and staff members against the benefits of in-person learning (2). During December 3, 2020-January 31, 2021, CDC investigated SARS-CoV-2 transmission in 20 elementary schools (kindergarten through grade 6) that had reopened in Salt Lake County, Utah. The 7-day cumulative number of new COVID-19 cases in Salt Lake County during this time ranged from 290 to 670 cases per 100,000 persons.† Susceptible§ school contacts¶ (students and staff members exposed to SARS-CoV-2 in school) of 51 index patients** (40 students and 11 staff members) were offered SARS-CoV-2 reverse transcription-polymerase chain reaction (RT-PCR) testing. Among 1,041 susceptible school contacts, 735 (70.6%) were tested, and five of 12 cases identified were classified as school-associated; the secondary attack rate among tested susceptible school contacts was 0.7%. Mask use among students was high (86%), and the median distance between students' seats in classrooms was 3 ft. Despite high community incidence and an inability to maintain ≥6 ft of distance between students at all times, SARS-CoV-2 transmission was low in these elementary schools. The results from this investigation add to the increasing evidence that in-person learning can be achieved with minimal SARS-CoV-2 transmission risk when multiple measures to prevent transmission are implemented (3,4). SN - 1545-861X UR - https://www.unboundmedicine.com/medline/citation/33764967/Low_SARS_CoV_2_Transmission_in_Elementary_Schools___Salt_Lake_County_Utah_December_3_2020_January_31_2021_ L2 - https://doi.org/10.15585/mmwr.mm7012e3 DB - PRIME DP - Unbound Medicine ER -