Inclusion Criteria:  Proven COVID-19 infection for which participant was admitted to the ICU for at least 3 days Included in the MaastrICCht cohort (a large database of serial measurements collected during ICU stay from patients with COVID-19 admitted to the ICU in the Maastricht University Medical Center+) Informed consent is given Sufficient command of the Dutch language to follow test instructions and understand the information letter, informed consent, and questionnaires  Exclusion Criteria:  Objective cognitive impairments before hospital admission for the COVID-19 infection An unexpected incident leading to severe neurological damage after hospital discharge (such as stroke or traumatic brain injury) Contra-indications for MRI scanning (e.g. metal implants, cardiac pacemaker, claustrophobia, pregnancy, and tattoos in the head/neck region) Unwillingness to be informed about clinical relevant (abnormal) MRI-findings Contra-indications for a gadolinium-based MRI contrast agent (known allergy or insufficient kidney function determined by an eGFR < 30 mL/min) Physical inability to travel to one of the locations (e.g. bedridden patients)