Griffith et al. report COVID-19 symptom persistence in a national population-based cohort over 50 years old in Canada. These data allow the authors to estimate the background symptom prevalence in the cohort, given not everyone had COVID-19, but also to explore a broader range of pre-pandemic risk factors for post-acute COVID-19 symptom persistence.
- Lauren E. Griffith
- Marla Beauchamp
- Theodore Cosco
