Dr. Deborah Anderson, professor of obstetrics, gynecology, and microbiology at Boston University, is currently developing a form of prophylaxis against HIV and HSV that uses plant-grown human antibodies to neutralize these viruses in the female genital tract. Anderson has been working closely with the industry to develop a system of producing antibodies to HIV cheaply and massively in tobacco plants. The so-called "plantibodies" are then hoped to be applied to numerous other viruses, perhaps even influenza and rhinovirus.
Trials for another anti-HIV gel were cancelled in November because they appeared to be ineffective at preventing infection. Here's hoping that this one shows happier results.