The human papillomavirus infection, or HPV, is the most common sexually transmitted infection in the U.S., according to the Centers for Disease Control and Prevention. HPV is associated with health problems including genital warts and cancers, but a vaccine has been available since 2006 to help stop the virus. The CDC reports more than 12 years of data supports the HPV vaccine is safe and effective, yet HPV vaccination rates across the U.S. still remain low.