| ACE-2 | Angiotensin-Converting Enzyme 2 |
| ACIP | Advisory Committee on Immunization Practices |
| CARPA | Complement Activation-related Pseudo-Allergy |
| CDC | Centers for Disease Control |
| COVID-19 | Coronavirus Disease 2019 |
| EUA | Emergency Use Authorization |
| EMA | European Medicines Agency |
| FDA | Food and Drug Administration |
| IgE | Immunoglobulin E |
| IgG | Immunoglobulin G |
| IgM | Immunoglobulin M |
| LNP | Lipid Nano Particles |
| MRGPRx2 | Mas-related G Protein-Coupled Receptor X2 |
| MMWR | Morbidity and Mortality Weekly Report |
| PAF | Platelet Activating Factor |
| PEG | Polyethylene Glycol |
| RNA | Ribonucleic Acid |
| mRNA | messenger Ribonucleic Acid |
| SARS-CoV-2 | Severe Acute Respiratory Syndrome Coronavirus 2 |
| VAERS | Vaccine Adverse Events Reporting System (VAERS). |