What is your blood group? How many of you willing to donate blood?

Donating blood is a very meaningful thing I think. I have been donating blood ever since when I was a college freshman. There are always some Blood Donating bus on the street, but I only went to offical hospital for blood donating. I think it is quite important for us to protect ourselves when we are going to donate blood. And my blood type is O, the most common group.