A new government report reveals that a surprising number of boys received the vaccine for human papillomavirus (HPV) last year, the first year that it was recommended for adolescent boys. The Centers for Disease Control and Prevention says 1 in 5 boys received at least one dose of the HPV vaccine, NBC News reports.
Shared through sexual contact, HPV can cause cervical cancer in women and genital warts in both sexes, and in rare cases, throat and anal cancer. The vaccine was first recommended for girls ages 11 and 12 beginning in 2006, and then recommended for boys in 2011. More from NBC News:
The shots are largely intended not to protect boys from disease, but to stop them from spreading a sexually transmitted virus to girls that could cause cervical cancer.
The vaccine hasn't been very popular among girls. The government report issued Thursday is the first real sense of how many boys are getting the shots.
"It's a good start," said Shannon Stokley, a vaccination expert with the Centers for Disease Control and Prevention.
Introduced in 2006, the vaccine protects against human papillomavirus, which is spread during sex. Most infections go away on their own, without people developing symptoms. But the virus can cause cervical cancer in females, genital warts in both sexes, and some other, less common conditions like throat and anal cancer.
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, it was also recommended for boys that age to help prevent the virus's spread.
The CDC report covers vaccination rates for last year, the first full year since the shots were advised for boys. It's based on telephone calls to families for about 19,000 boys and girls ages 13 to 17.
About 21 percent of the boys had gotten at least one of the three doses. Less than 7 percent were fully vaccinated.
The rates look relatively good compared to the initial rates for some other vaccines aimed at adolescents. For example, the initial rate for a meningococcal vaccine was just 12 percent.
Rates tend to start low when a vaccine is first recommended and build after. So the HPV numbers for boys are reason to be optimistic, said the CDC's Dr. Melinda Wharton, although she added a word of caution.
"Given how the coverage level has stalled for girls, though, a solid start isn't enough," she said.
Image: Three teen boys, via Shutterstock