The nucleic acid sequences of the cDNA were 92% to 93.3% homologous to the Indian and Burmese strains, 90.7% and 77.4% homologous to Chad and Mexican strains. The ORF2 of HEV is relatively stable between the Asian strains.

• 与印度株和缅甸株的同源性在 92%25以上 ；而与乍得和墨西哥株的同源性分别为 90 .；7%25和 77