Universal donor: Learn who is a true

Learn who is a true universal donor and what blood types are compatible with them. Find out the rarest and most common blood types in India and how blood transfusion can save lives. Learn what it means to be a universal blood donor or recipient, and how blood typing works. Find out why blood types need to match, and what happens if they don't. Learn about blood types, how they are determined, and why they matter for transfusions. Find out who is a universal donor and who has a rare blood type. The concept of a " universal donor " began in the early 1900s, when the Austrian-American scientist and Nobel Prize winner Karl Landsteiner discovered the ABO blood group system, identifying how certain blood types could or couldn't mix. In the following decades, scientists also discovered the Rh factor, further refining blood compatibility. The term " universal donor " was first used after scientists discovered that blood group O — particularly O negative — could be transfused to almost ...