| EIV | equine influenza virus |
| HA | haemagglutinin |
| HAT | human airway trypsin-like protease |
| NA | neuraminidase |
| PV | pseudotyped virus |
| PVNT | pseudotyped virus neutralisation test |
| TMPRSS2/4 | Transmembrane Protease Serine S1 member 2/4 |
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