Mayo Clinic is reminding people that Type O negative is the universal blood type, meaning it can be used in an emergency no ...

This rarest of blood types is defined by an unusual Rh factor that is neither negative nor positive ... blood groups and what ...

Background: In emergency situations O negative blood (O-) transfusion may be required before standard compatibility tests can be completed. An increase in the use of emergency O-in our paediatric ...

This rare blood type is found in approximately 1 in 10,000 individuals in India and only 1 in a million worldwide. The absence of the H antigen, even in O negative blood, makes finding compatible ...