By Sam Baker - 10/15/12 06:03 PM EDT
The study acknowledged that it could not account for girls who became sexually active without using any form of related healthcare.
The Planned Parenthood Federation of America said the findings should put to rest concerns about the vaccine.
"At Planned Parenthood health centers we see every day the importance of protecting young people against this potentially life-threatening virus. We hope this study’s findings will encourage more parents to vaccinate their daughters and sons against HPV," the organization said in a statement.