The disease caused by the SARS-CoV2 virus is responsible for the global pandemic. Symptoms and clinical coursesof the infection can vary a lot. Some of the most severe cases were taken care of by me at corona-ward at the University Hospital of Vienna. Many patients still show various symptoms weeks to months following the initial infection. In this cases lung function tests,laboratory testsandradiological examinations may be necessary. Rehabilitation and respiratory therapy are of outmost importance in these patients.