When parents say 'no' to HPV shots, teens have no choice. Some states are changing that.

Jennifer Canada remembers when her pediatrician in Middletown, Maryland, recommended a vaccine that would protect her against a virus that is known to cause several types of cancer. But Canada's mother, who had consented to all of the other recommended immunizations for her 13-year-old daughter, declined it, saying she'd heard rumors that the shots had caused the death of several girls.