In Countdown #50, Jimmy Olsen interviews an incarcerated Joker about the murder of Duela Dent, who had called herself the Joker's Daughter. The Joker states that he never had any daughter, and expresses awareness of the Multiverse's existence and of shifts in reality. The Joker appears as he did before Batman #655.
All blood is made of the same basic elements, however not all blood is alike. There are eight common blood types. In an emergency, blood type O- can be given to anyone because it is most likely to be accepted by all blood types. O- is the Universal Donor. Type A+ can donate to A+, AB+. Type A- can donate to A-, A+, AB+, AB-.
Some are just more rare than others. Everyone should donate blood, regardless of their blood type. O-is the universal donor (which means anyone can use their blood) and AB+ is the universal receiver (which means they can use any type of blood).All the other types are used only on patients with the same blood type (A, B, AB or O).The most common type of grouping is the ABO grouping.ome are just more rare than others. Everyone should donate blood, regardless of their blood type. O-is the universal donor (which means anyone can use their blood) and AB+ is the universal receiver (which means they can use any type of blood).