inclusion criteria: * fulfils pragmatic diagnostic criteria of idiopathic post-covid syndrome: a) confirmed acute covid-19 by a positive pcr for sars-cov-2; b) persistent symptoms at least 3 months following acute covid-19 without symptom-free interval; c) functional disability to an extent that interrupts all or a majority of normal activities (such as work/school attendance, physical exercise, social activities, etc.) * lives in one of the following norwegian counties: oslo, viken, innlandet, vestfold og telemark, agder * informed consent to participation exclusion criteria * other chronic illnesses or demanding life situations that might explain persistent symptoms and disability * sustained organ damage (lung, heart, brain) following acute, serious covid-19 * bedridden * insufficient command of norwegian language

inclusion criteria: * fulfils pragmatic diagnostic criteria of idiopathic post-covid syndrome: a) confirmed acute covid-19 by a positive pcr for sars-cov-2; b) persistent symptoms at least 3 months following acute covid-19 without symptom-free interval; c) functional disability to an extent that interrupts all or a majority of normal activities (such as work/school attendance, physical exercise, social activities, etc.) * lives in one of the following norwegian counties: oslo, viken, innlandet, vestfold og telemark, agder * informed consent to participation exclusion criteria * other chronic illnesses or demanding life situations that might explain persistent symptoms and disability * sustained organ damage (lung, heart, brain) following acute, serious covid-19 * bedridden * insufficient command of norwegian language

inclusion criteria: fulfils pragmatic diagnostic criteria of idiopathic post-covid syndrome: a) confirmed acute covid-19 by a positive pcr for sars-cov-2; b) persistent symptoms at least 3 months following acute covid-19 without symptom-free interval; c) functional disability to an extent that interrupts all or a majority of normal activities (such as work/school attendance, physical exercise, social activities, etc.) lives in one of the following norwegian counties: oslo, viken, innlandet, vestfold og telemark, agder informed consent to participation exclusion criteria other chronic illnesses or demanding life situations that might explain persistent symptoms and disability sustained organ damage (lung, heart, brain) following acute, serious covid-19 bedridden insufficient command of norwegian language

inclusion criteria: fulfils pragmatic diagnostic criteria of idiopathic post-covid syndrome: a) confirmed acute covid-19 by a positive pcr for sars-cov-2; b) persistent symptoms at least 3 months following acute covid-19 without symptom-free interval; c) functional disability to an extent that interrupts all or a majority of normal activities (such as work/school attendance, physical exercise, social activities, etc.) lives in one of the following norwegian counties: oslo, viken, innlandet, vestfold og telemark, agder informed consent to participation exclusion criteria other chronic illnesses or demanding life situations that might explain persistent symptoms and disability sustained organ damage (lung, heart, brain) following acute, serious covid-19 bedridden insufficient command of norwegian language