Human papillomavirus, better known as HPV, is the most common sexually transmitted infection, with 79 million Americans affected in 2013. The HPV vaccine can have a few different names, but the bottom line is that it protects against human papillomavirus. Dr. Cindy Gellner talks about the affects that HPV can have on the human body and how the vaccine can help fight against HPV. She also discusses the risk factors for getting HPV and who should be getting the vaccine.