| AD | Alzheimer’s disease |
| ACE2 | Angiotensin-converting enzyme 2 |
| Apoe4 | Apolipoprotein E4 |
| BBB | Blood–brain barrier |
| CNS | Central nervous system |
| CSF | Cerebrospinal fluid |
| CXCL8 | Chemokine (C-X-C motif) ligand 8 |
| COVID-19 | Coronavirus disease-2019 |
| CRH | Corticotropin-releasing hormone |
| DAMPs | Damage-associated molecular patterns (DAMPs) |
| GFAP | Glial fibrillary acidic protein |
| HK-1 | Hemokinin-1 |
| HLA | Human leukocyte antigen |
| Iba1 | Calcium-binding adapter molecule 1 |
| IL-1β | Interleukin-1 beta |
| LPS | Lipopolysaccharide |
| MMCP6, 7 | Mast cell proteases 6 and 7 |
| MAP-2 | Microtubule-associated protein-2 |
| MCI | Mild cognitive impairment |
| mtDNA | Mitochondrial DNA |
| MS | Multiple sclerosis |
| NGF | Nerve growth factor |
| NfL | Neurofilament light chain |
| NK-1 | Neurokinin-1 |
| NLGs | Neuroligins |
| NT | Neurotensin |
| NSAIDs | Non-steroidal anti-inflammatory drugs |
| NF-κB | Nuclear factor kappa B |
| NLRP3 | Nucleotide-binding domain (NOD)-like receptor protein 3 |
| PAMPs | Pathogen-associated molecular patterns |
| PD | Parkinson’s disease |
| PASC | Post-acute sequelae of SARS-CoV-2 |
| PTSD | Post-traumatic stress disorder |
| S | Spike |
| SARS-CoV-3 | Severe Acute respiratory syndrome coronavirus 2 |
| SP | Substance P |
| TLRs | Toll-like receptors |
| TNF | Tumor necrosis factor |