One of the world's largest collections of AIDS posters can be found at the University of Rochester. It contains more than 6200 posters from over 100 countries in over 60 languages, and can be viewed at http://aep.lib.rochester.edu. The posters were donated by Dr. Edward Atwater, an emeritus professor of medicine at the University of Rochester. Atwater collected most of the posters between around 1990 and 2005. Andreas von Bubnoff asked him how the collection came together.