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-.
Your blood type determines who you can donate to, or receive blood from. People with type O negative (O-) are considered universal donors, as they can donate red blood cells to all other blood type recipients. Thatâs why itâs always in high demand â itâs used in emergency situations when there is no time to test a patientâs blood type.