Epidemiologic Study

Associations between the number of self-reported SARS-CoV-2 infections and the diagnosis of new health conditions among adults in Canada, January 2020–June 2023

Background: Preexisting health conditions increase the risk of severe outcomes after SARS-CoV-2 infection. Emerging evidence suggests this relationship may be bi-directional with infection potentially increasing the risk of new health condition diagnoses.

Objective: To examine the association between number of SARS-CoV-2 infections and the subsequent diagnosis of new health conditions, excluding longer-term symptoms after SARS-CoV-2 infection, and to examine associations between infection and vaccination characteristics, including longer-term symptoms, and new diagnoses among the infected.