dr. art ammann, battled the aids crisis here among children from the very beginning, and now he's working in africa to help families there. he's been honored for founding an international organization called global strategies for hiv prevention. this man is a legend. he started working on the aids crisis 35 years ago, and at the age of 81? >> 81 now. >> oh, my goodness. you are still fighting the fight with this book. but just for folks who don't know what you did back in the day, you made history. you changed the course of the aids epidemic. >> it was an extraordinary time, cheryl, as you know, because you covered a lot of what happened and did a lot of the interviews. but we had a new disease that was unknown cause. at first, the thought was that it affected only gay men. but then, in a short time, it became evident that this affected women and children, and that was my part. i was a pediatrician. we were doing immunologic tests, and within six months of michael gottlieb's discovery of aids, we found women and children who had the same symptomatology and we felt that they were also aids