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Semantic information from SemMedBD (by NLM)
1. Virus CAUSES COVID-19
Subject
Virus
Predicate
CAUSES
Object
COVID-19
2. Virus CAUSES COVID-19
Subject
Virus
Predicate
CAUSES
Object
COVID-19
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).
Subject(s)

Full text: Available Collection: International databases Database: MEDLINE Main subject: Schools / SARS-CoV-2 / COVID-19 Limits: Adult / Child / Child, preschool / Female / Humans / Male / Middle aged Country/Region as subject: North America Language: English Journal: MMWR Morb Mortal Wkly Rep Year: 2021 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Schools / SARS-CoV-2 / COVID-19 Limits: Adult / Child / Child, preschool / Female / Humans / Male / Middle aged Country/Region as subject: North America Language: English Journal: MMWR Morb Mortal Wkly Rep Year: 2021 Document Type: Article