Évolution des contacts sociaux des Québécois selon le statut de comorbidités et le statut vaccinal avant et pendant la pandémie de COVID-19

Authors: Godbout, Aurélie
Advisor: Brisson, Marc
Abstract: Physical distancing measures implemented since the beginning of the COVID-19 pandemic have limited transmission of the virus by limiting social contacts. In the current context, with the emergence of new variants that are more transmissible/severe and with high immune escape, it is important to assess the evolution of socialcontacts according to the risk of COVID-19 complications, particularly after vaccination. The main objective of this study was to describe time trends in social contacts by comorbidity status, before and during the first three waves of the pandemic. A secondary objective was to explore the influence of vaccination status with the first dose on the association between comorbidity status and social contacts. Data from the Canadian repeatedcross-sectional population-based study of social contacts, CONNECT, were used to address these objectives. Participants were recruited by random digit dialing during pre-pandemic (2018-2019) and pandemic (April 2020to July 2021) periods. Data was collected using a self-administered web-based questionnaire and included social contacts, pre-existing medical conditions and, from the third wave, vaccination status. The results show that contacts significantly decreased during the first wave compared with the pre-pandemic period for individuals with and without comorbidities. During the second wave, individuals with comorbidities appear to have protected themselves by maintaining fewer contacts than individuals without comorbidities. The results of the exploratory analysis suggest that individuals with comorbidities felt protected by the first dose of the vaccine, as they increased their contacts to levels similar to vaccinated individuals without comorbidities during the third wave. Monitoring time trends in social contacts of individuals at risk of COVID-19 complications could help inform future targeted interventions.
Document Type: Mémoire de maîtrise
Issue Date: 2022
Open Access Date: 13 June 2022
Permalink: http://hdl.handle.net/20.500.11794/73596
Grantor: Université Laval
Collection:Thèses et mémoires

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