I had two initial reactions to...

...this story. First, I didn't know that they actually had developed a vaccine for AIDS. Granted, it isn't really high on my epidemological radar; some of the other more exotic things like Ebola, Marburg, and Bird Flu scare the crap out of me, but since I don't engage in any of the risky behaviors that put on at risk, I rarely give it a lot of consideration. Besides, my understanding was that it was going to be exceedingly difficult to create a vaccine for it since it is a retrovirus. The next thought that came to mind was "Are we able to accurately screen for infection before it develops into something we can recognize?" Maybe Dick's better half can hold forth and enlighten us.