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Lockdown impact on age-specific contact patterns and behaviours, France, April 2020.
Bosetti, Paolo; Huynh, Bich-Tram; Abdou, Armiya Youssouf; Sanchez, Marie; Eisenhauer, Catherine; Courtejoie, Noémie; Accardo, Jérôme; Salje, Henrik; Guillemot, Didier; Moslonka-Lefebvre, Mathieu; Boëlle, Pierre-Yves; Béraud, Guillaume; Cauchemez, Simon; Opatowski, Lulla.
  • Bosetti P; Institut Pasteur, Université de Paris, Mathematical Modelling of Infectious Diseases Unit, CNRS UMR 2000, Paris, France.
  • Huynh BT; Institut Pasteur, Epidemiology and Modeling of Antibiotic Evasion unit, France.
  • Abdou AY; Université Paris-Saclay, UVSQ, Univ. Paris-Sud, Inserm, CESP, Anti-infective evasion and pharmacoepidemiology team, Montigny-le-Bretonneux, France.
  • Sanchez M; Institut Pasteur, Epidemiology and Modeling of Antibiotic Evasion unit, France.
  • Eisenhauer C; Université Paris-Saclay, UVSQ, Univ. Paris-Sud, Inserm, CESP, Anti-infective evasion and pharmacoepidemiology team, Montigny-le-Bretonneux, France.
  • Courtejoie N; Data Management Core Facility, Institut Pasteur, Paris, France.
  • Accardo J; Institut Pasteur, Université de Paris, Mathematical Modelling of Infectious Diseases Unit, CNRS UMR 2000, Paris, France.
  • Salje H; DREES, French Ministry for Health, Paris, France.
  • Guillemot D; Insee (The French National Institute of Statistics and Economic Studies), Montrouge, France.
  • Moslonka-Lefebvre M; Institut Pasteur, Université de Paris, Mathematical Modelling of Infectious Diseases Unit, CNRS UMR 2000, Paris, France.
  • Boëlle PY; Department of Genetics, University of Cambridge, Cambridge, United Kingdom.
  • Béraud G; Institut Pasteur, Epidemiology and Modeling of Antibiotic Evasion unit, France.
  • Cauchemez S; Université Paris-Saclay, UVSQ, Univ. Paris-Sud, Inserm, CESP, Anti-infective evasion and pharmacoepidemiology team, Montigny-le-Bretonneux, France.
  • Opatowski L; Association DataCovid, Paris, France.
Euro Surveill ; 26(48)2021 12.
Article in English | MEDLINE | ID: covidwho-1613503
ABSTRACT
BackgroundMany countries implemented national lockdowns to contain the rapid spread of SARS-CoV-2 and avoid overburdening healthcare capacity.AimWe aimed to quantify how the French lockdown impacted population mixing, contact patterns and behaviours.MethodsWe conducted an online survey using convenience sampling and collected information from participants aged 18 years and older between 10 April and 28 April 2020.ResultAmong the 42,036 survey participants, 72% normally worked outside their home, and of these, 68% changed to telework during lockdown and 17% reported being unemployed during lockdown. A decrease in public transport use was reported from 37% to 2%. Participants reported increased frequency of hand washing and changes in greeting behaviour. Wearing masks in public was generally limited. A total of 138,934 contacts were reported, with an average of 3.3 contacts per individual per day; 1.7 in the participants aged 65 years and older compared with 3.6 for younger age groups. This represented a 70% reduction compared with previous surveys, consistent with SARS-CoV2 transmission reduction measured during the lockdown. For those who maintained a professional activity outside home, the frequency of contacts at work dropped by 79%.ConclusionThe lockdown affected the population's behaviour, work, risk perception and contact patterns. The frequency and heterogeneity of contacts, both of which are critical factors in determining how viruses spread, were affected. Such surveys are essential to evaluate the impact of lockdowns more accurately and anticipate epidemic dynamics in these conditions.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: RNA, Viral / COVID-19 Type of study: Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Limits: Humans Country/Region as subject: Europa Language: English Journal subject: Communicable Diseases Year: 2021 Document Type: Article Affiliation country: 1560-7917.Es.2021.26.48.2001636

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Full text: Available Collection: International databases Database: MEDLINE Main subject: RNA, Viral / COVID-19 Type of study: Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Limits: Humans Country/Region as subject: Europa Language: English Journal subject: Communicable Diseases Year: 2021 Document Type: Article Affiliation country: 1560-7917.Es.2021.26.48.2001636