Patients treated with Extracorporeal Membrane Oxygenation (ecmo) for severe respiratory or circulatory failure show severe long term disability due to impaired lung -, cerebral-, cognitive function and impaired quality of life. This study investigates the long term outcome of all patients who are still alive three years after ECMO treatment for severe respiratory failure during the H1N1 2009 pandemic at the Karolinska University Hospital.

Inclusion Criteria:

• Survivors of ECMO treatment for influenza a/h1n1 pneumonia during 2009/2010 pandemics at the ECMO Center Karolinska

Exclusion Criteria:

• None

All patients who survived ECMO treatment due to infection with Influenza A/H1N1 2009 up to 3 years after discharge from hospital