CORNELIA is a system of collecting questionnaires on cognitive disorders related to COVID-19. The scientists of the Silesian University of Technology, which is a member of the Silesian Aviation Cluster, developed the CORNELIA platform (Coronavirus Neurological Impairment), which enables the e-mail invitation of selected people by doctors to participate in an anonymous survey on the general health status of patients with COVID-19 and the occurrence of neurological symptoms in them. It is supposed to support people diagnosed as having COVID-19, who are affected by neurological changes. The aim of the project is to verify, by means of statistical and machine learning methods, the hypothesis of increased occurrence of neurological and cognitive disorders during the course of COVID-19 disease and to assess the scale of neurological complications after its cure.