Table 1.

Overview of the work packages, including study aims and cohorts

WP	Aim	Cohorts involved*
WP1	1. Describe the prevalence, severity, time patterns and duration of long COVID symptoms up to 2 years after acute infection and their relationship with health-related quality of life. 2. Describe the received rehabilitation and paramedical support in relation to the persisting symptoms and health-related quality of life.	Data from all cohorts will be used.
WP2	3. Describe the pathophysiological mechanisms that may cause long COVID symptoms and the role of vulnerability/resilience factors.	Every cohort will deliver results for specific pathophysiological hypotheses.
WP3	4. Develop and validate a prediction model for the persistence of symptoms, stratified by severity of COVID-19.	Data from all cohorts will be used.
WP4	5. Develop a patient platform prototype where patients can digitally consult their reported outcomes, compare them with previous outcomes, relate to reference information and find reported information that fits their situation.	The platform will be developed and tested in a limited no of cohorts (to be determined).

*CORFU cohorts include Adelante, CAPACITY-COVID, COVAS, DC&TC, ELVIS, MaastrICCht and POPCOrn.

CAPACITY-COVID, Cardiac complications in patients with COVID-19 cohorts; DC&TC cohort, Dutch COVID and Thrombosis Consortium cohort; COVAS, Bernhoven Early detection of Vascular damage after COVID-19 cohort; ELVIS, ZuydErLand COVID-19 regiStry; MaastrICCht, Maastricht Intensive Care COVID cohort; POPCOrn, POPulation health impact of the COVID-19 pandemic; WP, work package.