In this 2006 photo, a doctor holds a vial of the human papillomavirus (HPV) vaccine Gardasil in his Chicago office.
In this 2006 photo, a doctor holds a vial of the human papillomavirus (HPV) vaccine Gardasil in his Chicago office. Charles Rex Arbogast AP
In this 2006 photo, a doctor holds a vial of the human papillomavirus (HPV) vaccine Gardasil in his Chicago office. Charles Rex Arbogast AP