though this news has been published some weeks before,it was not confirmed whether it can really function.but now a method has been discovered to change the blood groups A,B and AB into group 0, the rarest blood group.one group of scientists along with Dr. Henrik Clausen from Boston found a method to change all other types of blood into 0.Dr. Henrik found an bacterial enzyme which can split the carbohydrate in Group A (e.g.N-acetyl galactosamin) and in Group B( beta- galactose).Till now only that enzyme was known which could remove group B antigene(carbohydrate molecule).The so developed blood group 0 has not been used in clinics yet as the level of tolerance of such created blood is being tested.But the problems with Rh-factor still exits.Nevertheless, a big step against untimely demise. astu: