| EID50 | 50% embryonic infectious dose |
| ELISA | Enzyme-linked immunosorbent assay |
| U | Units of activity (for recombinant interferon alpha) |
| Mx | Myxovirus Resistance Protein |
| NT | Nasal turbinates |
| PBS | Phosphate-buffered saline |
| RT-PCR | Reverse transcription followed by polymerase chain reaction |
| SD | Standard deviation |
| SEM | Standard error of the mean |
| TCID50 | 50% tissue culture infectious dose |
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