The segment, toward the end of the show, was pegged as part of regularly scheduled Friday follow-ups to recent shows that sparked viewer feedback. "Very few shows have generated as much reaction" as the HPV show, Katie said, so "I want to make sure we all understand the facts about this vaccine and the human papillomavirus."

Katie spent more than six minutes (an eternity in television time) interviewing Dr. Anne Schuchat, the director of the CDC's National Center for Immunization and Respiratory Diseases, who discussed facts about HPV, and the vaccine, that should have been included in the first program.

You can view the Schuchat segment here. Note that the anti-vaccination folks are out in force in the comment thread, and the text below the Schuchat video seems to me to be weighted toward the anti-vax view.