| SARS-CoV-2 | Severe acute respiratory syndrome coronavirus 2 |
| aa | Amino acids |
| ACE2 | Angiotensin-converting enzyme 2 |
| Alum | Alhydrogel adjuvant 2% |
| AS03 | Adjuvant System 03 |
| BHK | Baby hamster kidney |
| BHK-hACE2 | BHK cells stably expressing human ACE2 |
| BPL | β-propiolactone |
| CT | Cytoplasmic tail |
| DMEM | Dulbecco’s modified Eagle’s medium |
| eGFP | Enhanced green fluorescent protein |
| ELISA | Enzyme-linked immunosorbent assay |
| F | Fusion protein |
| FBS | Fetal bovine serum |
| FP | Fusion peptide |
| G protein | Glycoprotein |
| GPO | Government Pharmaceutical Organization |
| HA | Hemagglutination |
| HN | Hemagglutinin–neuraminidase |
| hpi | Hours post-infection |
| HR | Heptapeptide repeat sequence |
| HRP | Horseradish peroxidase |
| HXP-S | Hexapro-spike |
| IACUC | Institutional Animal Care and Use Committee |
| ID50 | Inhibitory dilution at which 50% neutralization is achieved |
| IM | Intramuscularly |
| IP | Intraperitoneal |
| NDV | Newcastle disease virus |
| NTD | N-terminal domain |
| PBS | Phosphate-buffered saline |
| PBST | 1× PBS (pH 7.4) containing 0.1% (v/v) Tween-20 |
| Pen Strep | Penicillin plus streptomycin |
| RBD | Receptor-binding domain |
| RBM | Receptor-binding motif |
| rcVSV | Replication-competent vesicular stomatitis virus |
| rcVSV-eGFP-CoV2-S | Replication-competent VSV engineered to express a GFP reporter and a SARS-CoV-2 spike protein in place of the native VSV-G protein |
| TM | Transmembrane domain |
| VOCs | Variants of concern |