METHODS	We randomized primary school children in Gansu and Jilin provinces into four groups to receive either ( 1 ) Chinese live attenuated hepatitis A vaccine ( H2 strain ) , ( 2 ) domestic inactivated hepatitis A vaccine ( Healive ( ) ) , ( 3 ) imported inactivated hepatitis A vaccine ( Havrix ( ) ) or ( 4 ) hepatitis B vaccine ( Control group ) .\