There is no such thing as donating blood without B blood, because as long as a healthy adult, any blood type can donate blood, and there is no restriction on blood type. If there is a restriction on B blood, people who need to be transfused with B blood clinically will have no blood source to transfuse, so it is said that clinically, as long as a healthy adult can donate blood normally. In China’s blood donation, in addition to ABO blood type, the Rh blood type system is also checked, because when donating blood, both blood systems are checked, especially the Rh blood type system, which is a blood type system independent of the ABO blood type system, and there are two types of Rh systems, one is positive and the other is negative, but the vast majority of people in China are positive and very few are negative, and negative people Therefore, before donating blood, in addition to checking the ABO blood type, there is also checking the Rh blood type.