| ADEM | Acute Disseminated Encephalomyelitis |
| AHNE | Acute Hemorrhagic Necrotizing Encephalopathy |
| CNS | Central Nervous System |
| CT | Computed Tomography |
| COVID-19 | Coronavirus infectious disease -2019 |
| CLOCC | Cytotoxic Lesion of Corpus Callosum |
| GBS | Guillain-Barré Syndrome |
| IDSA/ATS | Infectious Disease Society of America/American Thoracic Society |
| MRI | Magnetic Resonance Imaging |
| MERS | Mild encephalitis/encephalopathy with reversible splenial lesion |
| MFS | Miller-Fisher syndrome |
| MS | Multiple Sclerosis |
| nCov | Novel Coronavirus |
| ON | Optic Neuritis |
| PNS | Peripheral Nervous System |
| PET | Positron emission tomography |
| PRES | Posterior Reversible Encephalopathy Syndrome |
| PRISMA | Preferred Reporting Items for Systematic reviews and Meta-Analyses |
| RT-PCR | Reverse Transcription Polymerase Chain Reaction |
| SARS-CoV-2 | Severe Acute Respiratory Distress Syndrome coronavirus 2 |