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Characteristics of HEV genotypes.
| HEV genotypes | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| Year of discovery | 1983 | 1986 | 1995 | 2003 |
| Geographic distribution | Developing countries; Asia/Africa | Sub-Saharan Africa, Mexico | Developed countries; USA, Europe, New Zealand, Argentina | India, Eastern Asia (China, Taiwan, Japan, Vietnam) |
| Hosts | Human, pig | Human | Human, pig, other mammalian species, shellfish | Human, pig, other mammalian species |
