Figure 1From: Prevalence of four different subgenotypes of genotype 4 hepatitis E virus among swine in the Shanghai area of ChinaThe maps of Shanghai of China. Black points indicate the sites of 23 farms we sampled from. "1", "2", "3", "4", "5" and "6" show six HEV positive farms; the HEV positive rate and subgroup that the HEV strains belong to are indicated in the bracket.Back to article page