WSAS is a multidisciplinary population-based longitudinal study on obstructive airway diseases and allergies in adults. WSAS started in 2008 and involves research from cellular mechanisms to clinical and population epidemiological studies.

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Children of Western Sweden (CWS) is a population-based longitudinal birth cohort study investigating the modifiable risk factors for asthma and allergy in children. CWS started in 2003, when children were recruited at the age of 6 months. A new birth cohort was established in 2018.

The BAMSE (Swedish abbreviation for Children, Allergy, Milieu, Stockholm, Epidemiology) project is an ongoing longitudinal, population-based prospective birth cohort including 4,089 children born between 1994 and 1996 in Stockholm, Sweden. The cohort was initially designed to study risk factors for allergic disease in childhood.

The Swedish National Airway Register (SNAR) was initiated in 2013 and includes data on patients with asthma and chronic obstructive pulmonary disease (COPD) from primary and secondary care, as well as hospitalized COPD patients. In 2020 a research group within the steering committee created a research database, linking data from SNAR with other Swedish national health registers given a unique opportunity to study real-life data among patients with obstructive lung diseases.

SCIFI-PEARL is a nationwide linked longitudinal multi-register, regularly updated, observational study for timely response to urgent scientific questions regarding SARS-CoV-2 and the COVID-19 pandemic.