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Background and purpose  We systematically reviewed available evidence for reports of neurological signs and symptoms in patients with COVID‐19 to identify cases with severe acute respiratory syndrome coronavirus (SARS‐CoV)‐2 infection or immune‐mediated reaction in the nervous system.    Methods  We followed PRISMA guidelines and used the MEDLINE, EMBASE, Google Scholar, MedRxiv and ChinaXiv databases to search for articles on COVID‐19 and nervous system involvement that were published from 1 January to 24 April 2020. Data on design, sample size, neurological assessment and related work‐up were extracted. Biases were assessed with the Newcastle–Ottawa scale.    Results  We analysed 27 publications on potential neuroinvasive or parainfectious neurological complications of COVID‐19. The reports focused on smell and taste ( n  = 5) and evaluation of neurological symptoms and signs in cohorts ( n  = 5). There were cases of Guillain‐Barré syndrome/Miller‐Fisher syndrome/cranial neuropathy (seven cases), meningitis/encephalitis (nine cases) and various other conditions (five cases). The number of patients with examination of cerebrospinal fluid and, in particular, SARS‐CoV‐2 polymerase chain reaction was negligible. Two had a positive SARS‐CoV‐2 polymerase chain reaction examination of cerebrospinal fluid specimen. Study of potential parenchymal involvement with magnetic resonance imaging was rare. Only four reports received a rating of the highest quality standards.    Conclusions  This systematic review failed to establish comprehensive insights into nervous system manifestations of COVID‐19 beyond immune‐mediated complications in the aftermath of respiratory symptoms. The authors therefore provide guidance for more careful clinical, diagnostic and epidemiological studies to characterize the manifestations and burden of neurological disease caused by SARS‐CoV‐2 on behalf of the Infectious Disease Panel of the European Academy of Neurology.

A systematic review of neurological manifestations of SARS‐CoV‐2 infection: the devil is hidden in the details