I was giving blood today at work. For those of you who haven’t given blood recently, there are some major changes in how the blood is collected. It used to be that blood was taken by swabbing your arm with rubbing alcohol, and then a needle was placed into the vein in your elbow, and the blood was collected in a sterile bag. That part is still the same. However, there is now a choice of how one gives blood: the conventional way, or a new way called “power red”. This involved a complex machine which takes a portion of...