Several factors contribute to the uniqueness of the anti-cancer vaccine HPV. Why was its unveiling met with some controversy? This clip is from The Forum at HSPH event, Vaccinating Children: Public Trust and Health, on September 15, 2014, presented in partnership with Tangled Bank Studios, a film production company of the Howard Hughes Medical Institute, and in collaboration with NOVA, PRI’s The World & WGBH.

Watch the entire Forum at HSPH series at ForumHSPH.org.