Bernard Roizman is considered to be the world's foremost expert on the herpes simplex virus. Roizman has spent his career trying to understand just how the herpes virus uses its 84 genes to hijack a human cell. This information could be used to prevent infections or to make therapeutic viruses, altered versions of nature's pests that might soon be used to treat diseases such as cancer.Roizman has won numerous research awards and trained many of the leading virologists around the world. In 2003, his efforts were recognized with a Llewellyn John and Harriet Manchester Quantrell Award for Excellence in Undergraduate Teaching. He also taught at John Hopkins University for nine years before coming to Chicago in 1965.