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Pilot Investigation of SARS-CoV-2 Secondary Transmission in Kindergarten Through Grade 12 Schools Implementing Mitigation Strategies - St. Louis County and City of Springfield, Missouri, December 2020.
MMWR Morb Mortal Wkly Rep. 2021 Mar 26; 70(12):449-455.MM

Abstract

Many kindergarten through grade 12 (K-12) schools offering in-person learning have adopted strategies to limit the spread of SARS-CoV-2, the virus that causes COVID-19 (1). These measures include mandating use of face masks, physical distancing in classrooms, increasing ventilation with outdoor air, identification of close contacts,* and following CDC isolation and quarantine guidance† (2). A 2-week pilot investigation was conducted to investigate occurrences of SARS-CoV-2 secondary transmission in K-12 schools in the city of Springfield, Missouri, and in St. Louis County, Missouri, during December 7-18, 2020. Schools in both locations implemented COVID-19 mitigation strategies; however, Springfield implemented a modified quarantine policy permitting student close contacts aged ≤18 years who had school-associated contact with a person with COVID-19 and met masking requirements during their exposure to continue in-person learning.§ Participating students, teachers, and staff members with COVID-19 (37) from 22 schools and their school-based close contacts (contacts) (156) were interviewed, and contacts were offered SARS-CoV-2 testing. Among 102 school-based contacts who received testing, two (2%) had positive test results indicating probable school-based SARS-CoV-2 secondary transmission. Both contacts were in Springfield and did not meet criteria to participate in the modified quarantine. In Springfield, 42 student contacts were permitted to continue in-person learning under the modified quarantine; among the 30 who were interviewed, 21 were tested, and none received a positive test result. Despite high community transmission, SARS-CoV-2 transmission in schools implementing COVID-19 mitigation strategies was lower than that in the community. Until additional data are available, K-12 schools should continue implementing CDC-recommended mitigation measures (2) and follow CDC isolation and quarantine guidance to minimize secondary transmission in schools offering in-person learning.

Authors

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Pub Type(s)

Journal Article

Language

eng

PubMed ID

33764961

Citation

Dawson, Patrick, et al. "Pilot Investigation of SARS-CoV-2 Secondary Transmission in Kindergarten Through Grade 12 Schools Implementing Mitigation Strategies - St. Louis County and City of Springfield, Missouri, December 2020." MMWR. Morbidity and Mortality Weekly Report, vol. 70, no. 12, 2021, pp. 449-455.
Dawson P, Worrell MC, Malone S, et al. Pilot Investigation of SARS-CoV-2 Secondary Transmission in Kindergarten Through Grade 12 Schools Implementing Mitigation Strategies - St. Louis County and City of Springfield, Missouri, December 2020. MMWR Morb Mortal Wkly Rep. 2021;70(12):449-455.
Dawson, P., Worrell, M. C., Malone, S., Tinker, S. C., Fritz, S., Maricque, B., Junaidi, S., Purnell, G., Lai, A. M., Neidich, J. A., Lee, J. S., Orscheln, R. C., Charney, R., Rebmann, T., Mooney, J., Yoon, N., Petit, M., Schmidt, S., Grabeel, J., ... Salzer, J. S. (2021). Pilot Investigation of SARS-CoV-2 Secondary Transmission in Kindergarten Through Grade 12 Schools Implementing Mitigation Strategies - St. Louis County and City of Springfield, Missouri, December 2020. MMWR. Morbidity and Mortality Weekly Report, 70(12), 449-455. https://doi.org/10.15585/mmwr.mm7012e4
Dawson P, et al. Pilot Investigation of SARS-CoV-2 Secondary Transmission in Kindergarten Through Grade 12 Schools Implementing Mitigation Strategies - St. Louis County and City of Springfield, Missouri, December 2020. MMWR Morb Mortal Wkly Rep. 2021 Mar 26;70(12):449-455. PubMed PMID: 33764961.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Pilot Investigation of SARS-CoV-2 Secondary Transmission in Kindergarten Through Grade 12 Schools Implementing Mitigation Strategies - St. Louis County and City of Springfield, Missouri, December 2020. AU - Dawson,Patrick, AU - Worrell,Mary Claire, AU - Malone,Sara, AU - Tinker,Sarah C, AU - Fritz,Stephanie, AU - Maricque,Brett, AU - Junaidi,Sadaf, AU - Purnell,Gemille, AU - Lai,Albert M, AU - Neidich,Julie A, AU - Lee,Justin S, AU - Orscheln,Rachel C, AU - Charney,Rachel, AU - Rebmann,Terri, AU - Mooney,Jon, AU - Yoon,Nancy, AU - Petit,Machelle, AU - Schmidt,Spring, AU - Grabeel,Jean, AU - Neill,Lee Ann, AU - Barrios,Lisa C, AU - Vallabhaneni,Snigdha, AU - Williams,Randall W, AU - Goddard,Clay, AU - Newland,Jason G, AU - Neatherlin,John C, AU - Salzer,Johanna S, AU - ,, Y1 - 2021/03/26/ PY - 2021/3/25/entrez PY - 2021/3/26/pubmed PY - 2021/3/27/medline SP - 449 EP - 455 JF - MMWR. Morbidity and mortality weekly report JO - MMWR Morb Mortal Wkly Rep VL - 70 IS - 12 N2 - Many kindergarten through grade 12 (K-12) schools offering in-person learning have adopted strategies to limit the spread of SARS-CoV-2, the virus that causes COVID-19 (1). These measures include mandating use of face masks, physical distancing in classrooms, increasing ventilation with outdoor air, identification of close contacts,* and following CDC isolation and quarantine guidance† (2). A 2-week pilot investigation was conducted to investigate occurrences of SARS-CoV-2 secondary transmission in K-12 schools in the city of Springfield, Missouri, and in St. Louis County, Missouri, during December 7-18, 2020. Schools in both locations implemented COVID-19 mitigation strategies; however, Springfield implemented a modified quarantine policy permitting student close contacts aged ≤18 years who had school-associated contact with a person with COVID-19 and met masking requirements during their exposure to continue in-person learning.§ Participating students, teachers, and staff members with COVID-19 (37) from 22 schools and their school-based close contacts (contacts) (156) were interviewed, and contacts were offered SARS-CoV-2 testing. Among 102 school-based contacts who received testing, two (2%) had positive test results indicating probable school-based SARS-CoV-2 secondary transmission. Both contacts were in Springfield and did not meet criteria to participate in the modified quarantine. In Springfield, 42 student contacts were permitted to continue in-person learning under the modified quarantine; among the 30 who were interviewed, 21 were tested, and none received a positive test result. Despite high community transmission, SARS-CoV-2 transmission in schools implementing COVID-19 mitigation strategies was lower than that in the community. Until additional data are available, K-12 schools should continue implementing CDC-recommended mitigation measures (2) and follow CDC isolation and quarantine guidance to minimize secondary transmission in schools offering in-person learning. SN - 1545-861X UR - https://www.unboundmedicine.com/medline/citation/33764961/Pilot_Investigation_of_SARS_CoV_2_Secondary_Transmission_in_Kindergarten_Through_Grade_12_Schools_Implementing_Mitigation_Strategies___St__Louis_County_and_City_of_Springfield_Missouri_December_2020_ L2 - https://doi.org/10.15585/mmwr.mm7012e4 DB - PRIME DP - Unbound Medicine ER -