MATTHEW YGLESIAS has more on blood donation, and says that the ever-stiffening requirements for blood donation are largely unfounded. I’m not so sure, though, that the motivation is to drive up the price of blood. That’s a suggestion I was skeptical of when I posted on this last year, and I still regard it as unlikely, though not impossible. More likely, I think, they’re just overreacting to their ball-dropping over HIV.