The report is published in the December issue of Pediatrics.
For the study, Stokley's team used data from the 2006-2009 National Immunization Survey -- Teen, which assesses vaccination coverage in U.S. children aged 13 to 17.
The researchers found that over the period, the number of teens getting the TdaP shot rose from 11 percent to 56 percent. For the meningitis vaccine, the rate went from 12 percent to 54 percent.
The HPV vaccine regimen is given in three separate shots. The number of girls who got at least one dose of the HPV vaccine climbed from 25 percent in 2006 to 44 percent in 2009, while the number of girls who got all three required doses went from 18 percent to 27 percent, the researchers said.
If doctors had given all the needed vaccines to their teenaged patients in 2009, TdaP and meningitis vaccine coverage could have been as high as 80 percent and coverage for the first shots for HPV could have reached 74 percent, the researchers noted.
According to the report, the main reasons for parents not getting these vaccines for their teens were: not knowing about the vaccine, not having the vaccine recommended by a doctor and (for TdaP and meningitis) believing that the vaccine was not necessary.
For the HPV vaccine, some parents said they didn't know about the vaccine, they believed it wasn't needed because their child was not yet sexually active or they didn't think the vaccine was necessary to prevent HPV.
And coverage rates for the three new vaccines varied widely by state: from a low of about 15 percent in Mississippi to a high of more than 63 percent in Rhode Island.
Infectious disease expert Dr. Marc Siegel, an associate professor of medicine at New York University in New York City, believes tha
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