The Centers for Disease Control and Prevention reported Thursday that 49 percent of girls had gotten at least the first dose in the three-shot vaccination series against human papilloma virus, or HPV. The sexually-transmitted bug can cause cervical cancer and genital warts.
The reason for the low rate? Some experts think parents are uneasy with the sexual issues attached to the vaccination.
In contrast, the CDC said about two-thirds of teens have gotten shots for bacterial meningitis and tetanus, diphtheria and whooping cough.