When my parents informed me that my blood type was A+, I felt a strange sense of pride. If A+ was a top grade in school, then surely A+ must also be the most excellent of blood types—a biological mark of distinction.
It didn't take long for me recognize just how silly that feeling was, but I didn't learn much more about what it really meant to have A+. By the time I was an adult, all I really knew was that if I should end up in a hospital in need of blood, the doctors there would need to make sure they transfused me with a suitable type.
And yet there remained some nagging questions. Why do 40 percent of Caucasians have Type A, while only 27 percent of Asians do? Where do different blood types come from, and what do they do?
Read 59 remaining paragraphs | Comments
