These are hard figures to get. We were planning to do another study in 2002 of the same sort in a medium-security prison and were within two days of starting when Corrections shut us down and wouldn't let us do it. What I can tell you is that in 1994 we did a study, and 12% of inmates said they had injected during the course of their prison sentence. In 1998 we asked the same question, and the figure had gone up to 25%.
We think, and I think Corrections agrees, that part of the problem was the random drug screening that was introduced. That meant it was impossible for people to smoke marijuana and get away with it, because it kicks around in the urine for up to two weeks after use, whereas cocaine is gone within a few hours, and so is most of the metabolite of heroin. So there are some maneuvers that clearly have increased risk in the prisons in a rather indirect sort of way.
The other thing that increases harm is cell searches that remove the few syringes there are. Sometimes two or three ranges are using the same syringe, which may be hidden behind a brick in the shower area. So there are major problems.
Are people injecting more? I don't know that, but I'm certainly not seeing any less communicable disease.