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Tracking the progressive spread of the SARS-CoV-2 Omicron variant in Italy, December 2021 - January 2022
Paola Stefanelli; Filippo Trentini; Daniele Petrone; Alessia Mammone; Luigina Ambrosio; Mattia Manica; Giorgio Guzzetta; Valeria D Andrea; Valentina Marziano; Agnese Zardini; Carla Molina Grane; Marco Ajelli; Angela Di Martino; Flavia Riccardo; Antonino Bella; Monica Sane Schepisi; Francesco Maraglino; Piero Poletti; Anna Teresa Palamara; Silvio Brusaferro; Giovanni Rezza; Patrizio Pezzotti; Stefano Merler.
Afiliación
  • Paola Stefanelli; Istituto Superiore di Sanita
  • Filippo Trentini; Dondena Centre for Research on Social Dynamics and Public Policy, Bocconi University, Milan, Italy
  • Daniele Petrone; Istituto Superiore di Sanita
  • Alessia Mammone; Ministero della Salute
  • Luigina Ambrosio; Istituto Superiore di Sanita
  • Mattia Manica; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy
  • Giorgio Guzzetta; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy
  • Valeria D Andrea; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy
  • Valentina Marziano; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy
  • Agnese Zardini; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy
  • Carla Molina Grane; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy
  • Marco Ajelli; Laboratory for the Modeling of Biological and Socio-technical Systems, Northeastern University, Boston, MA, USA
  • Angela Di Martino; Istituto Superiore di Sanita
  • Flavia Riccardo; Istituto Superiore di Sanita
  • Antonino Bella; Istituto Superiore di Sanita
  • Monica Sane Schepisi; Ministero della Salute
  • Francesco Maraglino; Ministero della Salute
  • Piero Poletti; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy
  • Anna Teresa Palamara; Istituto Superiore di Sanita
  • Silvio Brusaferro; Istituto Superiore di Sanita
  • Giovanni Rezza; Ministero della Salute
  • Patrizio Pezzotti; Istituto Superiore di Sanita
  • Stefano Merler; Center for Health Emergencies, Bruno Kessler Foundation, Trento, Italy
Preprint en En | PREPRINT-MEDRXIV | ID: ppmedrxiv-22269949
ABSTRACT
The SARS-CoV-2 variant of concern Omicron was first detected in Italy in November 2021. Data from three genomic surveys conducted in Italy between December 2021 and January 2022 suggest that Omicron became dominant in less than one month (prevalence on January 3 78.6%-83.8%) with a doubling time of 2.7-3.1 days. The mean net reproduction number rose from about 1.15 in absence of Omicron to a peak of 1.83 for symptomatic cases and 1.33 for hospitalized cases, while it remained stable for critical cases.
Licencia
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Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Tipo de estudio: Observational_studies Idioma: En Año: 2022 Tipo del documento: Preprint
Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Tipo de estudio: Observational_studies Idioma: En Año: 2022 Tipo del documento: Preprint