The COVID-19 Clinical Neuroscience Study (COVID-CNS) is a collaboration between the University of Liverpool and King's College London. Up to 30% of COVID-19 patients who come in to hospital have neurological problems. We are working to find and recruit these patients to take part in COVID-CNS. Patients who choose to take part will have two assessments of their nervous system. The first part is a "core" assessment performed by a research assistant. The second part is a full examination of the nervous system by a doctor. This study will test the core assessment to make sure it is reliable at finding nervous system problems.