![Dr. Nora Volkow](https://webarchive.library.unt.edu/web/20130218234623im_/http://blog.aids.gov/wp-content/uploads/nidadirector_noravolkow_small-150x150.jpg)
Despite great strides in treating HIV, and despite effective prevention strategies that have reduced its spread among many populations, about 50,000 new cases of HIV are still diagnosed each year. December 1, World AIDS Day, is a good time to remember not only how far we have come since HIV first appeared three decades ago,…