Imagine a world where the letters A, B and O have gone missing from everyday life. You couldn’t help but notice that something is off. These aren’t just random letters. A, B and O are the main blood groups,…

Imagine a world where the letters A, B and O have gone missing from everyday life. You couldn’t help but notice that something is off. These aren’t just random letters. A, B and O are the main blood groups,…