The Canadian Respiratory Research Network Long COVID-19 Study

We will prospectively recruit a representative, random sample of adult (age ≥ 18), community-dwelling patients, who have had a positive PCR test for COVID-19 infection and symptomatic infection five to 12 months previously. This cross-sectional, observational study will have two phases: 1. Screening: Screening for eligibility 2. Observation Period: 1. Online / telephone visit: All participants will complete a series of questionnaires (either online or by phone with the assistance of research personnel). In the questionnaires they will be asked about respiratory symptoms (the primary outcome), baseline participant data, burden of respiratory symptoms, overall quality of life, mental health issues as well as physical and psychological trauma from COVID-19. 2. In-person visit: All participants will complete pulmonary function testing including oscillometry. The study of COVID-19 infection and its long-term effects is constantly evolving. Over the course of this research study, new knowledge may become available that may lead to changes in the study's outcome measures.