| HEV | Hepatitis E Virus |
| rat HEV | Rat Hepatitis E Virus |
| RT-qPCR | Reverse Transcription Quantitative Polymerase Chain Reaction |
| RT-PCR | Reverse Transcription Polymerase Chain Reaction |
| ORF | Open Reading Frame |
| ND | Not Determined |
| NA | Not Available |
| PRISMA | Preferred Reporting Items for Systematic Reviews and Meta-Analyses |
| RNA | Ribonucleic Acid |