A boy in Lianyungang city of Jiangsu province was found to have cisAB blood type, a rare type found in an average of only one in 580,000 people, Modern Express reported.
While treating the boy, doctors at First People's Hospital of Lianyungang found the rare incidence that the type AB boy was born to a type O mother. They kept checking and found the boy and his father both have the cisAB blood type.
