ATLANTA -- Only about half of U.S. teenage girls have gotten a controversial cervical cancer vaccine, a rate that's changed little in three years.
"We're dropping the ball," said Dr. Thomas Frieden, head of the Centers for Disease Control and Prevention. "This is a huge disappointment."
About 54 percent of teenage girls have received at least one of the three HPV shots. Only a third were fully immunized with all three doses. Last year's rates were essentially unchanged from 2011, and up only slightly from 2010. Rates for other vaccines aimed at adolescents have risen much faster.
A big part of the problem: Family doctors aren't prodding patients to get HPV shots as forcefully as they recommend other vaccines, health officials said.
The vaccine, introduced in 2006, protects against human papillomavirus. The sexually transmitted bug can cause cervical cancer and genital warts. The vaccine was first recommended for girls ages 11 and 12 because it works best if given before a teen starts to have sex. In 2011, to help prevent the virus' spread, it was also recommended for boys that age.
More than 20 states have considered adding HPV to the vaccines required for school attendance, but only Virginia and the District of Columbia have done so. Most states abandoned it after political fights triggered by funding woes, concerns about the vaccine's safety and worries that the shots would promote promiscuity.
CDC studies have shown no significant side effects, and that girls who got the shots did not start having sex earlier than girls who didn't.
Dr. Anne Schuchat, who oversees the CDC's immunization programs, said school requirements aren't necessarily needed because the girls are already getting shots against bacterial meningitis and whooping cough that are required in some states. Those shots have been recommended for teens roughly about as long as HPV but vaccinations rates are much higher, 70 percent in 2011.
The new CDC report shows that 84 percent of the teen girls who hadn't gotten an HPV shot had been to a clinic or doctor for another vaccine. If they had gotten an HPV shot at the same time, the rate for at least one dose could be nearly 93 percent, CDC officials estimated.
Price has been an issue: three doses of HPV vaccine sell for more than $400. But today, health insurers cover that cost, and uninsured kids get the shots paid for through government health programs.
Nearly all sexually active men and women will get at least one type of HPV at some point in their lives, health officials say. Most show no obvious symptoms and eventually clear the virus.