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SARS-CoV-2 transmission patterns in educational settings during the Alpha wave in Reggio-Emilia, Italy.
Molina Grané, Carla; Mancuso, Pamela; Vicentini, Massimo; Venturelli, Francesco; Djuric, Olivera; Manica, Mattia; Guzzetta, Giorgio; Marziano, Valentina; Zardini, Agnese; d'Andrea, Valeria; Trentini, Filippo; Bisaccia, Eufemia; Larosa, Elisabetta; Cilloni, Silvia; Cassinadri, Maria Teresa; Pezzotti, Patrizio; Ajelli, Marco; Rossi, Paolo Giorgi; Merler, Stefano; Poletti, Piero.
Afiliación
  • Molina Grané C; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy; Department of Mathematics, University of Trento, Trento, Italy.
  • Mancuso P; Epidemiology Unit, Azienda Unità Sanitaria Locale - IRCCS di Reggio Emilia, Reggio Emilia, Italy.
  • Vicentini M; Epidemiology Unit, Azienda Unità Sanitaria Locale - IRCCS di Reggio Emilia, Reggio Emilia, Italy.
  • Venturelli F; Epidemiology Unit, Azienda Unità Sanitaria Locale - IRCCS di Reggio Emilia, Reggio Emilia, Italy.
  • Djuric O; Epidemiology Unit, Azienda Unità Sanitaria Locale - IRCCS di Reggio Emilia, Reggio Emilia, Italy; Department of Biomedical, Metabolic and Neural Sciences, Centre for Environmental, Nutritional and Genetic Epidemiology (CREAGEN), Public Health Unit, University of Modena and Reggio Emilia, Reggio Emil
  • Manica M; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy.
  • Guzzetta G; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy.
  • Marziano V; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy.
  • Zardini A; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy.
  • d'Andrea V; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy.
  • Trentini F; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy; Dondena Centre for Research on Social Dynamics and Public Policy, Bocconi University, Milan, Italy.
  • Bisaccia E; Public Health Unit, Azienda Unità Sanitaria Locale - IRCCS di Reggio Emilia, Reggio Emilia, Italy.
  • Larosa E; Public Health Unit, Azienda Unità Sanitaria Locale - IRCCS di Reggio Emilia, Reggio Emilia, Italy.
  • Cilloni S; Public Health Unit, Azienda Unità Sanitaria Locale - IRCCS di Reggio Emilia, Reggio Emilia, Italy.
  • Cassinadri MT; Public Health Unit, Azienda Unità Sanitaria Locale - IRCCS di Reggio Emilia, Reggio Emilia, Italy.
  • Pezzotti P; Department of Infectious Diseases, Istituto Superiore di Sanità, Rome, Italy.
  • Ajelli M; Laboratory for Computational Epidemiology and Public Health, Department of Epidemiology and Biostatistics, Indiana University School of Public Health, Bloomington, IN, USA.
  • Rossi PG; Epidemiology Unit, Azienda Unità Sanitaria Locale - IRCCS di Reggio Emilia, Reggio Emilia, Italy.
  • Merler S; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy.
  • Poletti P; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy. Electronic address: poletti@fbk.eu.
Epidemics ; 44: 100712, 2023 09.
Article en En | MEDLINE | ID: mdl-37567090
Different monitoring and control policies have been implemented in schools to minimize the spread of SARS-CoV-2. Transmission in schools has been hard to quantify due to the large proportion of asymptomatic carriers in young individuals. We applied a Bayesian approach to reconstruct the transmission chains between 284 SARS-CoV-2 infections ascertained during 87 school outbreak investigations conducted between March and April 2021 in Italy. Under the policy of reactive quarantines, we found that 42.5% (95%CrI: 29.5-54.3%) of infections among school attendees were caused by school contacts. The mean number of secondary cases infected at school by a positive individual during in-person education was estimated to be 0.33 (95%CrI: 0.23-0.43), with marked heterogeneity across individuals. Specifically, we estimated that only 26.0% (95%CrI: 17.6-34.1%) of students and school personnel who tested positive during in-person education caused at least one secondary infection at school. Positive individuals who attended school for at least 6 days before being isolated or quarantined infected on average 0.49 (95%CrI: 0.14-0.83) secondary cases. Our findings provide quantitative insights on the contribution of school transmission to the spread of SARS-CoV-2 in young individuals. Identifying positive cases within 5 days after exposure to their infector could reduce onward transmission at school by at least 30%.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: SARS-CoV-2 / COVID-19 Tipo de estudio: Prognostic_studies Límite: Humans País/Región como asunto: Europa Idioma: En Revista: Epidemics Año: 2023 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: SARS-CoV-2 / COVID-19 Tipo de estudio: Prognostic_studies Límite: Humans País/Región como asunto: Europa Idioma: En Revista: Epidemics Año: 2023 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Países Bajos