Ann, I must apologise for my "soap box" rant yesterday about clinical trials and placebos, as I have discovered that there ARE some Phase II trials that use placebos on a control group. One such trial for an AID's vaccine is currently being planned. Here's the link, and it just goes to show I should check my facts BEFORE I go spouting off...
http://www3.niaid.nih.gov/news/newsr.../globalvax.htm
<3 Lolly