I can't speak on behalf of other people. I wouldn't know what their concerns are.
I have talked; I get calls from other institutions asking why and when we started our post-exposure prophylaxis in our medical surveillance program. I can guarantee you that half of our institutions don't have it. But we have worked hard, we do have it at the University of Toronto, and it's the right thing to do. If someone has not done it, and they don't want to do it, I can't talk on their behalf.