ACE2	Angiotensin-converting enzyme 2
ADEM	Acute disseminated encephalomyelitis
ARDS	Acute respiratory distress syndrome
BBB	Blood-brain barrier
BDNF	Brain-derived neurotrophic factor
BMEC	Brain microvascular endothelium cells
CNS	Central nervous system
CSF	Cerebrospinal fluid
COVID-19	Coronavirus disease 2019
CCL-CXCL	Chemokines
CLR	C-type lectin receptors
CD8+	T cells Cytotoxic T cells
CD4+	T cells T-helper cells
FLAIR	Fluid-attenuated inversion recovery
LIF	Leukaemia inhibitory factor
MRI	Magnetic resonance imaging
MHC	Major histocompatibility complex
MMPs	Matrix metalloproteinase
MHV	Mouse Hepatitis Virus
MS	Multiple Sclerosis
NGF	Nerve growth factor
NG2	Nerve/glial antigen 2
PAMP	Pathogen-associated molecular patterns
PRR	Pattern recognition receptors
ROS	Reactive oxygen species
RNA	Ribonucleic acid
SARS-CoV-2	Severe acute respiratory syndrome coronavirus
Th	Helper T-cells
TJ	Tight junctions
TLR	Toll-like receptors
Treg	Regulatory T cells
TNF	Tumour necrosis factor
VEGF	Vascular endothelial growth factor
WHO	World Health Organization