Variations and mutations in the hepatitis B virus genome and their associations with clinical characteristics

Table 2 Hepatitis B virus subtypes and genotypes and their geographic distributions

Genotype/subgenotype	Geographic location
A
A1	Saharan Africa, India
A2	Northern Europe
A3	Western Africa
B
B1 (Bj)	Japan
B2-5	East and Southeast Asia
B6	Alaska, Northern Canada
C
C1-3	Taiwan, China, South Korea, Southeast Asia
C4	Australia
C5	Philippines, Vietnam
D
D1-5	Africa, Europe, Mediterranean countries and India
E	West Africa
F	Central and South America
G	France, Germany, United States
H	Central America
I	Vietnam and Laos
J	Ryukyu, Japan (Kalimantan)