For a feature on human papillomavirus (HPV), the most common sexually transmitted virus in the United States. The article highlights several leading researchers including Dr. Keerti Shah, a Johns Hopkins virologist who had been studying HPV and cervical cancer for more than 20 years, as well as Patti Gravitt, a first generation Shah protégé. Client: Johns Hopkins University. Publication: Johns Hopkins Public Health. Art Director: Robert H. Ollinger