| AU | Arbitrary Units |
| BAU | Binding Antibody Units |
| CDC | Centers for Disease Control and Prevention |
| CI | Confidence Interval |
| ESKD | End-Stage Kidney Disease |
| ICU | Intensive Unit Care |
| IQR | Interquartile Range |
| NCD | Non-Communicable Disease |
| RBD | Receptor Binding Domain |
| SD | Standard Deviation |
| VPD | Vaccine-Preventable Disease |
| WHO | World Health Organization |