 with an aluminum adjuvant to make the HPV vaccine appear safer. In other words, they said, let's do a trial, let's put 100 people in one who get the HPV vaccine, and let's do 100 people in the other side of the control group who get no vaccine. We'll call it the placebo. Actually, they do get a vaccine. They get saline injected in their arm. It's a placebo. And normally, you'd see, look, look at all the people who died and got sick who got the HPV vaccine.