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10.1001/jamanetworkopen.2021.28757

http://scihub22266oqcxt.onion/10.1001/jamanetworkopen.2021.28757
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suck abstract from ncbi


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pmid34636913      JAMA+Netw+Open 2021 ; 4 (10): e2128757
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  • Transmission of SARS-CoV-2 After COVID-19 Screening and Mitigation Measures for Primary School Children Attending School in Liege, Belgium #MMPMID34636913
  • Meuris C; Kremer C; Geerinck A; Locquet M; Bruyere O; Defeche J; Meex C; Hayette MP; Duchene L; Dellot P; Azarzar S; Marechal N; Sauvage AS; Frippiat F; Giot JB; Leonard P; Fombellida K; Moutschen M; Durkin K; Artesi M; Bours V; Faes C; Hens N; Darcis G
  • JAMA Netw Open 2021[Oct]; 4 (10): e2128757 PMID34636913show ga
  • IMPORTANCE: Recent data suggest a relatively low incidence of COVID-19 among children. The possible role that children attending primary school may play in the transmission of SARS-CoV-2 remains poorly understood. OBJECTIVE: To gain a better understanding of the possible role of children in the transmission of SARS-CoV-2. DESIGN, SETTING, AND PARTICIPANTS: This prospective cohort study was conducted from September 21 to December 31, 2020, in a primary school in Liege, Belgium, among a volunteer sample of 181 children, parents, and school employees. EXPOSURES: Participants were tested for SARS-CoV-2 infection once a week for 15 weeks through throat washing, performed with 5 mL of saline and collected in a sterile tube after approximately 30 seconds of gargling. Quantitative reverse transcription-polymerase chain reaction was performed to detect SARS-CoV-2 infection. MAIN OUTCOMES AND MEASURES: In case of test positivity, participants were asked to complete a questionnaire aimed at determining the timing of symptom onset and symptom duration. SARS-CoV-2 genetic sequencing was also performed. Confirmed cases were linked based on available information on known contacts and viral sequences. RESULTS: A total of 181 individuals participated in this study, including 63 children (34 girls [54.0%]; mean [SD] age, 8.6 [1.9] years [range, 5-13 years]) and 118 adults (75 women [63.6%]; mean [SD] age, 42.5 [5.7] years [range, 30-59 years]). Forty-five individuals (24.9%) tested positive: 13 children (20.6%; 95% CI, 10.6%-30.6%) and 32 adults (27.1%; 95% CI, 19.1%-35.7%) (P = .34). Children were more often asymptomatic compared with adults (6 [46.2%; 95% CI, 19.1%-73.3%] vs 4 of 31 [12.9%; 95% CI, 1.3%-24.5%]; P = .04). The median duration of symptoms was shorter in children than in adults (0.00 days [IQR, 0.00-1.00 days] vs 15.00 days [IQR, 7.00-22.00 days]). A reconstruction of the outbreak revealed that most transmission events occurred between teachers and between children within the school. Of the observed household transmission events, most seemed to have originated from a child or teacher who acquired the infection at school. CONCLUSIONS AND RELEVANCE: Despite the implementation of several mitigation measures, the incidence of COVID-19 among children attending primary school in this study was comparable to that observed among teachers and parents. Transmission tree reconstruction suggests that most transmission events originated from within the school. Additional measures should be considered to reduce the transmission of SARS-CoV-2 at school, including intensified testing.
  • |*COVID-19 Testing[MESH]
  • |*Mass Screening[MESH]
  • |Adolescent[MESH]
  • |Adult[MESH]
  • |Asymptomatic Infections/epidemiology[MESH]
  • |Belgium/epidemiology[MESH]
  • |COVID-19/diagnosis/epidemiology/*prevention & control/*transmission[MESH]
  • |Child[MESH]
  • |Child, Preschool[MESH]
  • |Contact Tracing[MESH]
  • |Disease Outbreaks[MESH]
  • |Female[MESH]
  • |Humans[MESH]
  • |Incidence[MESH]
  • |Logistic Models[MESH]
  • |Male[MESH]
  • |Middle Aged[MESH]
  • |Prospective Studies[MESH]
  • |School Teachers[MESH]


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